# How to Fix Broken Citations in Word and Google Docs

Broken citations in Word reference manager plugins almost always trace back to one thing: the citation fields in your document have lost their connection to the library that generated them. The single first check takes ten seconds. In Word on Windows, press Alt+F9. On a Mac, press Option+F9. This toggles the display of field codes. If you see long codes in curly braces, such as { ADDIN ZOTERO_ITEM ... } or { ADDIN EN.CITE ... }, your fields are intact and the problem is display or refresh related. If you see plain text with no braces at all, the dynamic link is gone and you will need to repair or rebuild.

This guide walks through how reference management software talks to your word processor, why those links fail, a symptom table you can scan quickly, a step by step diagnostic sequence, and the habits that keep citations from breaking again.

## How Citation Managers Actually Talk to Word and Google Docs

A citation plugin does not type "Smith, 2020" into your document as ordinary text. It inserts a live field, a small container that stores two things: a pointer to a record in your reference library and formatting instructions for the selected citation style. When you click refresh, the plugin reads the pointer, pulls the current metadata from the library, and rewrites the visible citation and bibliography.

In Word, these fields are part of the document file itself. Word can display them as codes or as rendered text, and most plugins store extra hidden data in the file, sometimes called a traveling library, so the document carries a copy of the reference data with it. EndNote is well known for this, and Zotero stores citation data in fields in a similar spirit.

In Google Docs, the Zotero and Paperpile add-ons store citation data inside the document structure and communicate with a desktop application or a cloud session through the browser. That dependency on an active session is why Google Docs citations fail in characteristic ways, especially in offline mode.

Understanding this architecture explains nearly every failure you will encounter. Citations break when the pointer is severed, when the field itself is damaged, when the library it points to has moved or changed, or when the plugin that interprets the field is missing or outdated.

## The Most Common Causes of Broken Citations

Working from most to least frequent, these are the failure patterns behind broken citations in Word and Google Docs.

### Pasting citations between documents

The leading cause. When you copy a paragraph from one document into another, the paste operation frequently strips the field wrapper and leaves static text that only looks like a citation. The citation renders correctly at first glance, so the damage goes unnoticed until the bibliography stops matching or the numbers will not reflow. Pasting between two documents managed by the same tool, with the same plugin active, usually preserves fields. Pasting into a plain text editor and back, or pasting with "match destination formatting," almost never does.

### Converting citations to plain text too early

Every major plugin offers a command to unlink or convert citations to static text. Writers click it when preparing a final manuscript, which is the correct use. Problems arise when the unlink happens weeks before submission, edits continue afterward, and there is no backup of the linked version. Once unlinked, the plugin can no longer see the citations, so renumbering, restyling, and adding references require manual work.

### Edits made inside the field codes

If you select a rendered citation and type over it, you are editing the display, not the underlying record. Worse, if field codes are visible and you delete a portion of a code, the field can become malformed. The plugin then either refuses to refresh the document or throws an error partway through. This is why the universal advice is to never edit a citation by hand. Instead, open it in the plugin's edit window and change the reference there.

### A moved, renamed, or different library

EndNote ties citations to a specific library file. If the library was moved, renamed, or if you opened a companion document with a different library selected, citations can render but show placeholders or fail to update. Zotero is more forgiving because it reads from a single local database, but a library that has not synced, or a fresh install on a new computer with an empty database, produces the same symptom.

### Multiple managers installed on the same machine

EndNote, Mendeley, and Zotero each install a Word add-in. Two add-ins can both try to manage the same document. The classic symptom is a document that was started with one tool, continued with another, and now contains two populations of fields that fight each other on every refresh. Fixing this means committing to one manager per document and removing the fields created by the other.

### Plugin and word processor version mismatches

Word updates occasionally disable add-ins or change the programming interface plugins rely on. After a Word update, a plugin button may vanish from the ribbon or a refresh may fail with a generic error. Reinstalling or updating the plugin usually restores it. In Google Docs, an add-on whose authorization has expired will silently refuse to act until you grant permissions again.

### Cloud sync conflicts

OneDrive, Dropbox, and Google Drive create conflict copies when the same file is edited from two machines. You keep editing the copy the plugin recognizes, then discover the version your coauthor opened was the conflict copy, which may carry damaged or stale fields. Sync conflicts are a frequent cause of "it worked yesterday" reports.

### Google Docs offline mode and session loss

The Zotero connector for Google Docs needs a live connection to the Zotero application. If you draft offline, citations can be inserted but cannot be refreshed against the library. When you come back online, a stale session produces an error banner instead of a rendered citation. Reloading the document while signed in and connected usually resolves it.

## Troubleshooting Table for Broken Citations

Scan the symptom column for what you are seeing. The confirm step tells you how to verify the cause before you change anything.

| Symptom | Likely cause | How to confirm | Fix |
|--|--|--|--|
| Citations display as long { ADDIN ... } codes | Field code display is toggled on | Codes appear throughout the whole document at once | Press Alt+F9 (Option+F9 on Mac) to toggle codes off. If only one field shows as code, click it and press Shift+F9 |
| Citations show as { } braces or question marks after refresh | Plugin lost contact with the library, or the library is empty or moved | Open the library app and confirm the cited references still exist | Reopen or relocate the library, let it finish syncing, then refresh citations in the document |
| Bibliography is missing or frozen at an old state | The bibliography field was deleted or the citation style changed without a refresh | Check whether the bibliography updates when you add a new citation | Reinsert the bibliography from the plugin menu, then refresh citations and bibliography together |
| Error dialog appears when refreshing citations | One or more corrupted fields, often from manual edits inside a citation | Refresh stops at the same point each time. Toggle field codes and look for a truncated or odd looking code near the failure point | Delete the malformed citation and reinsert it from the plugin. Then refresh the whole document |
| A pasted section shows citations as plain gray or black text with no highlight | Paste stripped the field wrapper into static text | Click the citation. A live field highlights or shows a plugin context menu. Static text does nothing | Reinsert those citations from the plugin, or copy again from the original using keep source formatting |
| All citations and the bibliography are now ordinary text | Someone ran the unlink or convert to plain text command | No fields respond to Alt+F9 toggling | Restore the linked version from a backup, file version history, or cloud version history. Otherwise rebuild manually |
| Two different citation formats mixed in one document | Citations were inserted with two different managers, or the style was changed mid draft | Toggle field codes and compare the ADDIN prefixes in the codes | Choose one manager. Remove the fields made by the other and reinsert them. Set one style in document preferences and refresh |
| Google Docs citation shows an error banner or does nothing when clicked | Add-on lost authorization, offline session is stale, or the desktop app is closed | Check the extensions menu for the add-on, and confirm you are online | Reload the document while online, reauthorize the add-on if prompted, reopen the desktop app, then refresh |
| Word freezes or crashes during a refresh | Very large document with many fields, or a corrupted Word template interfering with the add-in | Test refresh in a new blank document with three citations. If it works there, the issue is document or template specific | Disable other Word add-ins, reinstall the citation plugin, or split very long documents into sections and refresh in stages |
| In text numbers are wrong or out of order after edits | Pending field updates, or duplicate records in the library | Look for an update prompt from the plugin, and search the library for duplicate entries | Refresh citations and bibliography. Merge duplicates in the library first if any exist, then refresh again |

## A Diagnostic Sequence You Can Follow

![Decision path that starts by toggling field codes with Alt+F9 and leads to a display fix, a repair, or a rebuild.](/article-images/illustrations/broken-citations-in-word-reference-manager-field-check-triage.webp)

When the table does not immediately resolve your problem, work through this sequence in order. Each step narrows the cause.

1. **Identify the manager that created the citations.** Toggle field codes with Alt+F9 and read the ADDIN prefix. ZOTERO_ITEM means Zotero, EN.CITE means EndNote, and Mendeley citations in the Mendeley Cite add-in are handled differently, through the add-in panel rather than classic field text. You cannot fix a document until you know who made it.
2. **Determine whether fields or static text remain.** Click a suspect citation. A live field highlights, shows a shaded background, or opens an edit dialog. Dead text does none of these. This single distinction separates repairable documents from rebuild jobs.
3. **Confirm the plugin is installed and enabled.** In Word, check the ribbon or the File menu add-ins area. In Google Docs, check the Extensions menu. If the plugin is absent, reinstall it before touching the document.
4. **Confirm the library is present and current.** Open the desktop application. Verify the cited references exist and that syncing has completed. A library that is mid sync is the most common hidden cause of failed refreshes.
5. **Refresh in the correct order.** Refresh citations first, then the bibliography. Some plugins do this in one command. Doing them out of order, or refreshing while the cursor sits inside a citation, can leave the document half updated.
6. **Isolate the problem.** Copy a few paragraphs containing broken citations into a fresh document and refresh there. If they work, the original document has document level corruption. If they fail the same way, the problem is the plugin, the library, or the installation.
7. **Check document preferences.** Every plugin stores the chosen citation style inside the document. A style set to a numeric style while your target journal expects author date produces output that looks broken but is only misconfigured. Open the plugin's document preferences and confirm the style matches the journal requirement.
8. **Restore from version history as a last resort before rebuilding.** Word documents stored in OneDrive or SharePoint, and any Google Doc, keep version history. Rolling back to a version from before the breakage, then reapplying recent edits, is often faster than reinserting hundreds of citations.

## Fixes by Platform and Manager

### Fixing broken citations in Word with Zotero

Zotero stores citation data in Word fields. If refresh fails, first make sure the Zotero desktop application is running and the library has finished syncing. Then use the plugin's refresh command in the document. If a specific citation is corrupt, delete it and reinsert it from the Zotero pane. If the entire plugin fails after a Word update, reinstall the Zotero Word integration from Zotero's settings, which rebuilds the add-in registration. If your document came from another computer and shows errors throughout, confirm that the Zotero data directory on this machine contains the same items, since a partially synced library refreshes only the citations it can find.

### Fixing broken citations in Word with Mendeley

Mendeley Cite runs as an add-in panel rather than classic field codes, which changes the failure pattern. Citations inserted with the older Mendeley Desktop plugin are not always recognized by Mendeley Cite, and documents migrated between the two systems are a recurring source of broken formatting. Open the Mendeley Cite panel, confirm you are signed in to the account holding the references, and use the refresh or update function. For citations that will not respond, delete and reinsert them from the panel. Keep the whole document on one Mendeley system rather than mixing the legacy plugin and the current add-in.

### Fixing broken citations in Word with EndNote

EndNote embeds a copy of reference data in the document, which makes its failure modes distinctive. If citations display as {Author, Year #RecordNumber} style placeholders, EndNote is in unformatted mode. Choose the command to update citations and bibliography to reformat. If citations appear but show wrong or missing data, confirm the correct library is open, because EndNote formats against whichever library is currently selected. If you see a mixture of formatted and unformatted citations, convert the whole document to unformatted, then format the bibliography in one pass. Never delete the hidden field data manually, since that data is what allows the document to be reformatted on a machine that does not have the original library.

### Fixing broken citations in Google Docs

Google Docs failures cluster around sessions and authorization. Reload the document while online and signed into the same account used when the citations were created. Open the Zotero desktop application if you use Zotero, since the connector needs it. Reauthorize the add-on from the Extensions menu if prompted. If citations were inserted offline and now show errors, a refresh once online usually repairs them, because the stored citation data is intact and only the render step failed. If a collaborator without the add-on edited the document heavily, inspect their edits for pasted static text masquerading as citations.

### Recovering when nothing works

If the fields are gone and no backup exists, you are rebuilding. Two approaches reduce the pain. First, check whether the unlinked document still contains enough information in each citation, such as author and year, to locate the record in your library, then reinsert by searching. Second, if you previously unlinked a version of the document, some managers allow reformatting from the embedded data rather than the live library. This is a known strength of EndNote's traveling library. In the worst case, generate a bibliography from the library directly, paste it as text, and match in text citations by hand. It is tedious but deterministic, and it produces a correct document.

**A caution before you unlink anything.** The unlink or convert to plain text command is irreversible in the document itself. Always save a linked copy under a distinct filename, such as "manuscript_linked.docx," and perform the unlink on a duplicate you label as the submission version. The linked copy is your recovery path if errors surface during peer review or revision.

## Citation Manager Comparison for Choosing Your Tool

The right reference management software reduces breakage before it starts. The four tools most life science writers encounter differ in ways that matter for document stability.

| Tool | Cost model | Word integration | Google Docs support | Notable stability trait |
|--|--|--|--|--|
| Zotero | Free and open source | Field based add-in, reinstalls cleanly | Supported through a browser connector tied to the desktop app | Single local database, so library link failures are rare on a healthy install |
| Mendeley | Free with an Elsevier account | Current Mendeley Cite add-in panel | Limited compared with Word | Migration from the legacy desktop plugin to Mendeley Cite is the main breakage risk |
| EndNote | Paid | Deep integration with traveling library embedded in documents | Supported through current product offerings | Documents can often be reformatted on machines without the original library |
| Paperpile | Paid subscription | Works through export workflows | Strong native Google Docs add-on | Best fit for teams that draft entirely in Google Workspace |

Choose one tool per research group and one tool per document. Mixing tools mid project is the most avoidable source of broken citations.

## Prevention Practices

![Four step flow: confirm plugin, confirm library, refresh citations, then refresh the bibliography.](/article-images/illustrations/broken-citations-in-word-reference-manager-refresh-order.webp)

These habits eliminate most recurrence.

- **One manager per document, for the life of the document.** Decide at the start, and record the choice in the file name or a comment.
- **Insert citations only through the plugin.** Never type a citation where a field should be, and never edit rendered citation text directly.
- **Back up before any bulk operation.** Before refreshing a 200 citation document, changing styles, or unlinking, save a dated copy. In Google Docs, name a version in version history.
- **Finish syncing before you switch computers.** Open the desktop app, let the library finish syncing, then open the document. Editing a document against a half synced library invites placeholder citations.
- **Paste carefully.** When moving text between documents, use keep source formatting, and recheck a sample citation afterward by clicking it.
- **Keep styles consistent.** Set the citation style in document preferences once, early, and change it through the plugin rather than by editing the bibliography.
- **Resolve sync conflicts immediately.** When OneDrive or Dropbox announces a conflict copy, compare the two versions, keep the one with intact fields, and delete the other after confirming.
- **Do the unlink last.** Produce the plain text version only after content edits, coauthor approvals, and formatting checks are complete.
- **Reinstall the plugin after major Word updates.** If the ribbon tab disappears or refresh throws a generic error after an update, a clean reinstall of the Word integration is faster than debugging.

## Common Mistakes and Limitations

- **Editing the bibliography by hand.** Any manual change to a generated bibliography is overwritten on the next refresh. Fix the underlying record in the library instead, then refresh.
- **Blaming the document when the library is the problem.** Wrong journal names, missing page numbers, and duplicated authors are library data errors. Correct them in the reference record, and every document citing that record repairs itself on the next refresh.
- **Leaving duplicate records in the library.** Two entries for the same paper produce inconsistent numbering in numeric styles. Merge duplicates before refreshing, not after.
- **Fixing one citation in isolation.** A malformed field can block a refresh for the entire document. If refresh fails repeatedly, find and remove the offending field rather than refreshing in a loop.
- **Assuming Google Docs and Word citations are interchangeable.** Moving a document between word processors risks severing dynamic citations. Keep drafting in the platform where the document began. If you must move, decide whether you need live fields or finished text, and convert deliberately.
- **Menu names vary by version.** The exact labels for refresh, unlink, and document preferences differ across plugin versions and platforms. Match commands by function, not by memorized wording, and check the current official documentation for your plugin when a menu item seems missing.
- **A note on scope.** The procedures here cover the common failure patterns of the major plugins on current versions of Word and Google Docs. Individual cases, especially documents with years of editing history or heavily customized templates, may need support channels specific to your plugin or institution, where a specialist can inspect the file directly.

## Frequently Asked Questions

### Why do my Word citations show up as code in curly braces?

Field code display has been toggled on, either deliberately or by an accidental keypress. Press Alt+F9 on Windows or Option+F9 on Mac to switch back to rendered citations. If only one citation shows as code, select it and press Shift+F9.

### Can I move a Word document with citations into Google Docs without breaking them?

Usually not without consequence. Dynamic citation fields may not survive the transfer intact, so the safest approach is to finish the document in its original word processor. If you must move it, keep a linked backup in the original format and verify a sample of citations after the transfer.

### How do I know which citation manager created the citations in my document?

Toggle field codes with Alt+F9 and read the ADDIN prefix inside the braces. Zotero citations begin with ZOTERO_ITEM and EndNote citations begin with EN.CITE. Mendeley Cite manages citations through its add-in panel rather than classic field text.

### Is it safe to click "Unlink Citations" in Word?

Safe only as a final step. Unlinking converts live fields to static text permanently, so later restyling or renumbering becomes manual work. Save a clearly labeled linked copy first and unlink only a duplicate prepared for submission.

### Why did my citation numbers change after I edited the document?

Numeric citation styles renumber automatically according to the order of appearance. The numbers changed because the field updates ran correctly after your edits. If the new order looks wrong, check the citation style in document preferences and search your library for duplicate records.

### How do I fix broken citations without access to the original library?

If the document was created with EndNote, the embedded traveling library may allow reformatting even without the original library file. Otherwise, use the author and year information still visible in each citation to locate the records in a rebuilt library and reinsert them through the plugin.

### Why does the citation plugin not appear in my Word ribbon?

A Word update or a security setting has likely disabled the add-in. Check the add-ins management area in Word to confirm it is enabled, and reinstall the plugin's Word integration if it is missing. Conflicts between multiple citation add-ins can also hide buttons, so disable managers you are not using.

### Should I use Zotero, Mendeley, or EndNote?

Zotero is a strong default for students and most researchers because it is free, open source, and works in both Word and Google Docs. EndNote suits writers who need deep Word integration and embedded document libraries, and Mendeley suits writers already invested in its ecosystem. Pick one, commit to it per document, and the differences matter far less than consistency.

## Further Reading

- [The image of the manager-leader of the near future - an outline of the issues](https://doi.org/10.1515/manment-2015-0083)
- [Standards-Based Automated Remediation: A Remediation Manager Reference Implementation, 2011 Update](https://doi.org/10.21236/ada612385)
- [Certification & validation of biosafety level-2 & biosafety level-3 laboratories in Indian settings & common issues](https://pubmed.ncbi.nlm.nih.gov/29434059/)
- [Chapter 8 - Common Problems and Troubleshooting](https://doi.org/10.1016/B978-0-12-812032-3.00008-3)
- [The Procurement and Supply Manager's Desk Reference](https://doi.org/10.1002/9781119205098)
- [Transit Agency Intergovernmental Agreements: Common Issues and Solutions](https://doi.org/10.17226/22676)