AMA numbers sources with superscript Arabic numerals in the order they are first cited, then repeats the same number for later citations. Author names are surname followed by initials with no periods (Posner EA).
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In-text citation
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What this style does
Author format is surname + initials with no periods and no spaces between initials (Posner EA), and no and between names — just commas.
Six or fewer authors are all listed; with more than six, AMA uses the first three authors followed by et al. This is consistent across the AMA Manual of Style 11th edition and the major academic-library guides.
The journal-element pattern is Year;volume(issue):pages with no space after the semicolon and none before the colon. Page numbers are written in full (257-259, not 257-59).
Journal titles use the NLM/PubMed abbreviation. This tool prints what you type, so enter the abbreviated form (for example J Am Diet Assoc).
Give a DOI when there is one; only fall back to a URL when no DOI exists — AMA asks you not to include both.
How to use it
Pick the source type at the top of the form.
Fill in the fields that apply — leave optional ones empty.
The reference entry and the matching in-text citation update as you type; copy the reference with the button.
AMA uses superscript Arabic numerals, numbered in the order sources first appear, placed outside periods and commas but inside colons and semicolons. The same number is reused when you cite the source again; a range is written as a hyphenated span such as 3-8.
How many authors before et al. in AMA?
List all authors for six or fewer. With more than six authors, list the first three followed by et al.
Does AMA use a DOI or a URL?
Use the DOI when the article has one. Include a URL only when there is no DOI, and do not include both. With a URL, AMA also asks for an accessed date.
Are journal names abbreviated in AMA?
Yes. AMA uses the abbreviations in the NLM (National Library of Medicine) catalog. Because this tool cannot look them up for you, type the abbreviated form into the journal field.
Is anything I type stored or uploaded?
No. The page is pure client-side JavaScript: your citations are built in your browser and never transmitted anywhere.