If by ‘reference numbers’ you mean numbered citations, Word’s References tools can insert citations and build a bibliography, but numeric numbering depends on the selected citation style. For internal references to numbered items, use Cross-reference instead.
Steps
- For academic sources, open References and choose the citation Style required by your instructor/publication.
- Choose Insert Citation > Add New Source and enter the source metadata.
- Insert citations where needed; Word formats them according to the selected style.
- Use Bibliography to generate the reference list, then update it after source changes.
- If you mean a reference to a figure/table/heading inside the same document, use References > Cross-reference rather than the citation manager.
How it works
Styles such as IEEE use numeric citations, while APA commonly uses author-date. Manually typing `[1]`, `[2]` can break when references are inserted/reordered.
Important considerations
Confirm the required style with the current official guide or publisher. Word’s citation implementation may not cover every edge case, so proofread the final references.
Practical guidance
If your document uses footnote-style reference numbers rather than bracketed citations, use References > Insert Footnote or Insert Endnote. Word automatically renumbers notes as you add/delete them. Do not type superscript numbers manually, because the numbering and note links will not update reliably.
Additional details
For legal/technical documents that use numbered clauses, use Word’s multilevel list numbering and Cross-reference to refer to clause numbers. This keeps references synchronized when clauses move. Citation numbers, footnote numbers, and paragraph numbers are three distinct Word features.

Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
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