AMA Citation Style Guide

AMA Reference Page: How to Format the Reference List

An AMA reference list is numbered in the order sources are first cited in the text. Reference 1 is the first source cited, reference 2 is the next new source, and so on. If you cite the same source again later, you reuse its original number instead of creating another reference-list entry.

The individual reference format depends on the source type. Journal articles, books, websites and other materials require different bibliographic elements, but all entries must remain connected to the numerical citations used in the manuscript.

To generate and manage numbered references automatically, use the AMA Citation Generator. For the broader citation system, see the AMA 11th edition format guide.

By Muzammal Amin
Physics PhD researcher · Reviewed against AMA 11th edition

AMA reference list rules at a glance

Question AMA approach
How are references ordered? Numerically, by first appearance in the text
Are references alphabetical? No
What happens when a source is cited again? Reuse its original reference number
Where do full source details appear? In the numbered reference list
Should journal DOI be included? AMA 11th edition recommends including it when available
Should journal titles be abbreviated? Medical/scientific references commonly use standard journal abbreviations
Should every generated reference be checked? Yes

What is an AMA reference page?

The AMA reference page, more accurately described as the reference list, contains the full bibliographic details for the numbered sources cited in your manuscript. Each number in the text must point to the matching numbered entry in the list.

A simple relationship looks like this:

In text: Previous research reported a similar result.1

Reference list:
1. Author AA. Article title. Journal Abbrev. Year;Volume(Issue):Pages. doi:DOI.

The reference number therefore has meaning only when the in-text citation and the reference-list entry remain synchronized.

What order should AMA references appear in?

List references in the order they are first cited in the manuscript. Do not alphabetize the list by author surname.

If your manuscript first cites:

  1. a Smith journal article,
  2. a World Health Organization webpage, and
  3. a Brown textbook,

then those sources become references 1, 2 and 3 in that order, regardless of alphabetical order.

This sequencing rule is also used by journals that instruct authors to follow AMA style. For example, current author guidance from Academic Medicine tells authors to number references according to the order in which they are first cited in the manuscript, while Aesthetic Surgery Journal similarly requires consecutively cited reference numbers and a numerically ordered list.

Do repeated AMA citations create duplicate references?

No. When you cite the same source again, it keeps the reference number assigned at its first appearance.

For example:

Initial evidence supported the intervention.1 A later section discusses another result from the same study.1

The reference list still contains one entry for source 1.

Creating a second entry for the same article can lead to duplicate references and broken numbering. Our generator checks for duplicates using strong identifiers such as DOI, PMID or ISBN when available, with metadata-based matching as a fallback.

For more on repeated citations, see the AMA in-text citation guide.

What happens when the order of citations changes?

Because AMA numbering follows first appearance, inserting or moving a source can change the numbers of later references.

Suppose the original order is:

Source A → 1
Source B → 2
Source C → 3

If a new Source X is inserted before Source A, the sequence becomes:

Source X → 1
Source A → 2
Source B → 3
Source C → 4

The reference list and every corresponding in-text citation must remain aligned. This is one reason numbered-reference software is useful for longer manuscripts.

What does an AMA journal reference look like?

A journal reference commonly includes the author or authors, article title, abbreviated journal title, year, volume, issue where applicable, page range or article number, and DOI when available.

A practical pattern is:

Author AA, Author BB. Article title. Journal Abbrev. Year;Volume(Issue):Pages. doi:DOI.

Journal reference example

Kingscott G. Technical translation and related disciplines. Perspectives. 2002;10(4):247-255. doi:10.1080/0907676x.2002.9961449.

The official AMA Manual’s 11th-edition References chapter states that a DOI should be included for journal references when one is available.

For source-specific details, see the AMA journal citation guide.

Should journal names be abbreviated in the reference list?

Medical and scientific reference lists commonly use standardized journal-title abbreviations. The National Library of Medicine’s Citing Medicine provides detailed guidance on journal-title abbreviation and points users toward NLM resources for standardized titles.

That means you should not shorten a journal title simply by intuition. If PubMed metadata supplies an established abbreviated title, it can be useful for the reference, but the field should still be reviewed.

See AMA and NLM journal abbreviations for a dedicated explanation.

How are author names formatted in AMA references?

AMA references use a compact author format built around surnames and initials. Source metadata may contain full first names, initials, group authors or incomplete author information, so the author field should be checked before submission.

For example:

Geoffrey Kingscott → Kingscott G

The treatment of long author lists should follow the current AMA rule and any publication-specific instructions. Some journals using AMA-style references publish their own author-count rules, so always check the destination journal’s instructions when preparing a manuscript for submission.

What does an AMA book reference look like?

A book reference generally includes author or editor, book title, edition when relevant, publisher and publication year.

A practical pattern is:

Author AA. Book Title. 2nd ed. Publisher; Year.

A notable 11th-edition change is that the publisher’s location is no longer required in book references, according to the official References chapter.

See the AMA book citation guide for more examples.

What does an AMA website reference need?

A website reference may require an author or organization, page title, website name, publication or update date, access date and URL, depending on the information available on the page.

A conceptual pattern is:

Organization Name. Page title. Website Name. Published Month Day, Year. Accessed Month Day, Year. URL.

Web metadata is frequently incomplete. A generator may not be able to determine a reliable author or date automatically, so compare the generated result with the actual webpage.

See the AMA website citation guide.

Should a PMID appear as the reference number?

No. A PMID identifies a PubMed record; it is not the numerical position of a source in your AMA reference list.

For example:

PMID: 39874211

might identify an article in PubMed. If that article happens to be the third new source cited in your manuscript, it becomes reference 3—not reference 39874211.

Our generator uses PMID and PubMed URLs to identify the underlying article metadata and then assigns the AMA reference number according to the reference list.

Learn more in the AMA PubMed and PMID citation guide.

Where does the DOI go in an AMA reference?

For journal articles, the DOI belongs in the full reference when one is available. It does not replace the in-text reference number.

The workflow is:

DOI → article metadata → formatted journal reference → numbered reference-list entry

The DOI is especially useful for citation generation because it is a persistent scholarly identifier and can be used to retrieve structured metadata from services such as Crossref.

Does AMA require one universal reference-page layout?

AMA defines the reference system and the formatting of source entries, but the physical manuscript presentation may also be controlled by the journal, university, course or publisher receiving the work.

For example, some publications explicitly tell authors to place the reference list at the end of the manuscript and may prescribe additional manuscript formatting. A student assignment may instead have its own document template.

For that reason, do not assume that formatting rules from APA or MLA—such as alphabetization or a specific hanging-indent requirement—automatically apply to AMA. Follow the AMA reference structure and then check the submission instructions for page-level formatting such as spacing, margins, heading treatment and indentation.

Should the section be called “References” or “Bibliography”?

In medical and scientific manuscripts following AMA conventions, References is the standard term you will commonly encounter for the numbered source list. A bibliography can imply a broader list of consulted material, including works not directly cited.

If your journal, university or template specifies a particular heading, use that required heading.

Should uncited sources be added to an AMA reference list?

The numbered reference list is designed to correspond to citations in the manuscript. Adding unrelated material that is never cited breaks that connection and may conflict with submission requirements.

Many journal instructions explicitly require references in the list to correspond to citations in the text. Keep the list focused on the sources actually cited unless your assignment or publication specifically requests a broader bibliography.

Who is responsible for reference accuracy?

Automated citation tools can reduce repetitive work, but authors are still responsible for checking their sources. Journal author guidelines routinely instruct authors to verify that references are complete and accurate.

Before submission, check:

  • author names and initials;
  • article or book title;
  • journal title and abbreviation;
  • publication year;
  • volume and issue;
  • page range or article number;
  • DOI;
  • URL and access date where relevant;
  • reference numbering;
  • that every in-text number points to the correct source.

How our AMA Reference Generator manages the list

The AMA Citation & Reference Generator combines source lookup with list management so that references are not generated as isolated pieces of text.

The current workflow can:

  • retrieve metadata from DOI;
  • look up PMID directly;
  • resolve PubMed article URLs;
  • search ISBN book metadata;
  • retrieve webpage metadata;
  • search by article title;
  • import supported PDF and BibTeX information;
  • let you edit retrieved fields;
  • detect duplicate sources;
  • add sources to a numbered reference list;
  • move references up or down and update numbering;
  • copy individual references and superscript numbers;
  • export reference data in supported formats.

For data providers, caching, identifier handling and known limitations, see Methodology & Data Sources.

Generate an AMA citation

Example AMA reference list

The following examples illustrate the numerical structure of the list. They are not intended to replace source-specific verification.

  1. Kingscott G. Technical translation and related disciplines. Perspectives. 2002;10(4):247-255. doi:10.1080/0907676x.2002.9961449.
  2. Author AA, Author BB. Example article title. J Med Example. 2026;25(3):100-108. doi:10.xxxx/xxxxx.
  3. Author CC. Example Medical Book. 2nd ed. Example Publisher; 2026.

If reference 1 is cited again later, the list remains 1–3; no fourth entry is created for the repeat citation.

See AMA citation examples for more worked source formats.

Common AMA reference-list mistakes

Alphabetizing the references

AMA uses numerical order based on first citation, not alphabetical order.

Creating duplicates for repeated citations

The same source should keep the same reference number.

Letting in-text numbers and the list get out of sync

If references are moved or inserted, both the text and the list may need renumbering.

Using the full journal title when an approved abbreviation is expected

Medical journal titles are commonly abbreviated according to standardized title information.

Omitting a journal DOI that is available

The AMA 11th-edition References chapter recommends including DOI for journal references when available.

Copying metadata without checking it

DOI, PubMed, ISBN and webpage databases can contain incomplete or differently structured fields. Review the result.

Applying APA reference-page rules to AMA

Alphabetical ordering and other APA-specific layout rules should not be imported into AMA automatically.

Is the AMA reference format still based on the 11th edition?

Yes. The current AMA Manual of Style is the 11th edition, published in 2020. The online manual is actively updated by the AMA Manual of Style Committee.

In May 2026, for example, the official updates page added a new Chapter 3.18 on short-form references for space-limited formats such as posters and slide presentations. That means current online guidance should be checked when a specialized reference situation matters.

See AMA 11th edition explained for more context.

Frequently asked questions about the AMA reference page

Are AMA references numbered?

Yes. References are numbered according to the order in which sources are first cited in the manuscript.

Are AMA references alphabetical?

No. Alphabetical ordering is not the standard AMA reference-list system.

Do I list the same source twice if I cite it twice?

No. Reuse the source’s original reference number and keep one reference-list entry.

Does AMA use a bibliography?

The numbered list corresponding to citations in medical manuscripts is commonly called the reference list or References section. Use the terminology required by your institution or publication.

Does every AMA reference need a DOI?

No. Not every source has a DOI. For journal references, AMA 11th edition recommends including a DOI when one is available.

Should I abbreviate journal names?

Medical and scientific reference lists commonly use standardized journal-title abbreviations. Check authoritative title data rather than inventing an abbreviation.

Is a PMID the same as an AMA reference number?

No. PMID identifies a PubMed record; the AMA reference number is determined by citation order in your manuscript.

Does AMA require a hanging indent?

Do not automatically import APA or MLA page-layout rules into AMA. The reference content and numerical order should follow AMA, while indentation, spacing and other manuscript-layout details should also be checked against the requirements of the journal, university or publisher receiving your work.

Where does the reference list go?

Scientific journals commonly place the reference list after the manuscript text, but follow the submission template or assignment instructions that apply to your document.

Muzammal Amin

About the author

Muzammal Amin is a physicist and PhD researcher at the University of Turin. He leads the research, technical review and editorial development of AMAReferenceGenerator.com.

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