Office Settings & Configuration

How to Add More Reference Styles in Microsoft Word 365

Guest Writer Oct 1, 2026 868 views

Question details

The user wants to add additional reference styles to the standard list in Word 365 and needs to resolve an issue where default styles are missing.

How to Add More Reference Styles in Microsoft Word 365

Product: Microsoft Word 365
Device & OS: not provided
Scenario: Formatting an academic or professional document that requires specific citation guidelines not currently visible in the References tab.
Observed behavior: Certain standard reference styles are missing from the default dropdown menu, often due to language configurations, and new styles need to be manually integrated.

Before you start

Before modifying your settings, verify the exact name and version of the citation style you need (e.g., APA 7th edition, Harvard), and ensure you have downloaded the appropriate .XSL style file if it is a custom format.

Solution 1Recommended

Change Display and Proofing Language to English (United States)

Adjusting the default language settings can reveal built-in reference styles that are hidden due to regional configurations.

Microsoft Word ties many of its default citation styles (like APA and MLA) to the English (United States) language setting. If your Office installation is set to another language or region, these styles may not load properly in the References tab.

Open Word Options

Launch Microsoft Word 365, click on the 'File' menu in the top-left corner, and select 'Options' at the bottom of the left sidebar.

Navigate to Language Settings

In the Word Options dialog box, select the 'Language' tab from the left-hand menu.

Set English (US) as Preferred

Under both 'Office display language' and 'Office authoring languages and proofing', select 'English (United States)' and click the 'Set as Preferred' button.

Restart and Verify

Click 'OK', restart Microsoft Word, and navigate to the 'References' tab to check if the missing styles now appear in the 'Style' dropdown menu.

Change Display and Proofing Language to English (United States)

Language Pack Installation: If 'English (United States)' is not listed in your language settings, you may need to click 'Add a language' and download the corresponding language pack first.

Solution 2

Install Custom Reference Styles Manually (.XSL Files)

If the reference style is not built into Word, you can download its specific .XSL file and place it in the system directory to add it to your list.

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3. Manage References: Navigate to the 'References' tab on the top ribbon to easily insert citations, footnotes, and bibliographies.

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Frequently Asked Questions

Why are default reference styles like APA and MLA missing in Word 365?

Default reference styles can disappear if your Office display or authoring language is not set to English (United States). Many standard styles are tightly integrated with English proofing tools and will hide themselves if another language is set as the primary default.

Where does Microsoft Word store its citation style files?

Word stores its reference styles as XML-based stylesheet (.XSL) files. On a Windows PC, this directory is typically located at '%APPDATA%\Microsoft\Bibliography\Style'.

Can I use third-party citation managers with Word 365?

Yes. If the built-in styles do not meet your needs, you can install third-party citation add-ins such as Zotero, Mendeley, or EndNote. These tools integrate directly into Word and offer thousands of dynamically updated reference styles.

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