## Why Build Your AMA Citations With This Tool
Every medical, biomedical, nursing, pharmacy, and public-health student or researcher hits the same wall: AMA style is fiddly. The author block uses no periods between initials and no commas before the comma. The journal name has to be the abbreviated form from Index Medicus or PubMed, in italics, immediately followed by a year–volume–issue–page block whose punctuation has no spaces. The DOI gets a bare "doi:" prefix instead of the URL form everyone copies from a journal’s landing page. Sentence case applies to article and chapter titles but title (headline) case applies to book and journal names. Miss any one of these and you are sending an editor a copy-edit task instead of a manuscript. This tool exists because all of those rules can be written in code once and then never thought about again.
## What AMA Style Actually Is
AMA style is defined by the **AMA Manual of Style: A Guide for Authors and Editors**, published by the American Medical Association and Oxford University Press. The 11th edition (2020) is the current standard; many older theses, books and review articles still use the 10th edition (2007), with relatively minor differences. Both editions adopt a **numerical citation system**: sources are numbered consecutively in the order they first appear in the text, and the same number is reused every time the same source is cited again. The in-text marker is a superscript Arabic numeral immediately after the relevant text, placed *after* any punctuation: "Recent guidelines support this approach.¹"
The reference list at the end of the paper lists each source exactly once, in the order they were first cited (not alphabetically — that is APA). Each entry begins with the citation number, then the author block, then a source-type-specific formula. JAMA and the JAMA Network family (JAMA Cardiology, JAMA Dermatology, JAMA Health Forum, JAMA Internal Medicine, JAMA Neurology, JAMA Oncology, JAMA Ophthalmology, JAMA Pediatrics, JAMA Psychiatry, JAMA Surgery, and others) require AMA style. So do thousands of other medical and health journals worldwide and most American medical school assignments.
## The Six Source Types We Support
We support the six source types that account for around 95% of real-world AMA bibliographies in the medical sciences:
**Journal articles** are the workhorse. Format: `Authors. Article title in sentence case. Abbreviated Journal Name. Year;Volume(Issue):Pages. doi:10.xxxx` — for example, `Smith JA, Jones CD. Cardiovascular outcomes in adolescent patients. *JAMA Cardiol*. 2024;9(2):123-130. doi:10.1001/jamacardio.2024.0001`. The volume number is followed immediately by the issue in parentheses with no intervening space; the issue is followed immediately by a colon then the page range. The DOI never gets a URL prefix in AMA — it is always rendered as a bare "doi:" identifier.
**Books** follow `Authors. *Book Title in Title Case*. Edition. Publisher; Year.` — for instance, `Greenberg DA, Aminoff MJ, Simon RP. *Clinical Neurology*. 11th ed. McGraw Hill; 2024.` First editions omit the "1st ed." entirely; subsequent editions are written as ordinals ("2nd ed.", "3rd ed.", "11th ed."). Publisher names follow modern AMA practice — the publisher city is no longer required in AMA 11.
**Book chapters** are formatted as `Chapter authors. Chapter title in sentence case. In: Editors, ed[s]. *Book Title*. Edition. Publisher; Year:Pages.` The "ed." or "eds." abbreviation depends on whether there is one editor or several. Page numbers come at the very end after a colon.
**Webpages** use `Authors. Page title in sentence case. Website Name. Published Month Day, Year. Updated Month Day, Year. Accessed Month Day, Year. URL` with full month names always written out. The accessed date is mandatory for AMA — internet sources can change, and the accessed date tells the reader what version you saw. If no published date is available, you can omit it and rely on the accessed date alone.
**Newspapers** combine the article-style author and title with a different date and location block: `Authors. Article title. *Newspaper Name*. Month Day, Year:Section:Page.` Online newspaper articles add the URL and access date at the end.
**Online videos** (including YouTube, Vimeo, and conference recordings) use `Channel/Producer. Video title. Platform. Published Month Day, Year. Accessed Month Day, Year. URL`. AMA 11 explicitly added a multimedia category for this; treat the channel as the author when no individual is credited.
## How Autocite Works (And Why It’s Free)
Behind the search bar are five independent free metadata sources, none of which require an API key:
**CrossRef** is the official DOI resolver and metadata registry for almost every academic publisher. Pasting a DOI like `10.1001/jama.2024.0001` returns the canonical author list, title, container (journal/book), volume, issue, pages, and publication year. CrossRef serves these queries from a fast public REST API (api.crossref.org) and gives "polite pool" priority to clients that include a contact email in their User-Agent header — which we do.
**PubMed E-utilities** is the U.S. National Library of Medicine’s public API for the PubMed database. Pasting a PMID like `35123456`, the URL of any PubMed page (pubmed.ncbi.nlm.nih.gov/35123456), or any other identifier PubMed knows about returns a full medical-bibliographic record including the abbreviated journal name (the canonical Index Medicus/MEDLINE abbreviation) and any associated DOI.
**OpenLibrary** is part of the Internet Archive’s open book database. Pasting an ISBN-10 or ISBN-13 — with or without dashes, with or without an "ISBN:" prefix — returns the author list, full title, subtitle, publisher, and publication year. Older or self-published books are sometimes incomplete; for these, fall back to the manual form.
**YouTube oEmbed** is Google’s public oEmbed endpoint. We use it to grab the canonical video title and channel name without needing any YouTube Data API quota. The published date is scraped from the watch page itself.
**Webpage scraping** is performed server-side. We fetch the HTML, parse the <head> section for Open Graph tags (og:title, og:site_name, og:type, og:published_time), Twitter Card metadata, JSON-LD Schema.org Article objects (which carry author lists), and standard meta tags (author, article:published_time, article:modified_time). For news sites, JSON-LD usually carries the most accurate author and publication-date information — far more reliable than scraping the rendered page.
## Building a Bibliography That Survives Editor Review
The single biggest reason citation generators fail is that authors paste autocited entries blindly without checking them. Even the best metadata source has gaps. Older journal articles often miss page ranges. Newspapers often miss authors. YouTube videos rarely have a structured published date. Books occasionally come back from OpenLibrary with only the publisher name and no city or year. The live preview built into this tool is there for exactly this reason — every keystroke updates the preview, so you can spot a missing field, a wrong year, or a misformatted journal abbreviation immediately. The validator below the form lists any required fields you have not filled, so you do not save half-broken citations into your bibliography.
A few field-by-field tips. **Authors**: AMA wants `Smith JA`, not `Smith, J. A.`. The tool accepts either form — and even free-form like `John A. Smith` or `John Smith` — and converts to AMA on the fly. Corporate authors (`World Health Organization`, `American Heart Association`) are passed through verbatim. **Journal abbreviation**: PubMed returns the canonical NLM abbreviation in the "source" field, which is what AMA expects. If you do not have the abbreviation handy, paste the full journal name into both fields and the formatter will use the abbreviation field if present. **Year**: any year format works; we extract the four-digit year automatically. **Pages**: write the range with a hyphen, like `123-130`; we do not normalize this because some journals use elision (`123-30`) and some do not. **DOI**: paste any of the three forms — bare (`10.1001/jama.2024.0001`), prefixed (`doi:10.1001/...`), or URL (`https://doi.org/10.1001/...`); we strip the URL prefix and render only "doi:".
## In-Text Citations Done Right
The in-text helper builds the trickier part of AMA correctly. Picking citations 1, 2, and 3 yields `1-3` (en dash range, no spaces). Picking 1, 3, 5 yields `1,3,5` (commas, no spaces). Adding a page number to a citation produces `4(p15)`. Mixed cases combine cleanly: `4(p15),5-7,10(pp8-11)`. The output is offered in two forms — Unicode superscript characters that you can paste anywhere (academic emails, blog posts, comments) and a plain digit form that you superscript inside Word using `Ctrl+Shift++`. The Unicode form is also fine for most scholarly journals’ web platforms, although final typeset versions always use real superscript markup.
## Privacy and What Happens to Your Bibliography
Your bibliography lives in your browser’s localStorage. Closing the tab and reopening the page restores the list. Nothing about it is uploaded, logged, or attributed to your IP. The autocite endpoint hits the upstream metadata API on your behalf and returns the result; the request is not stored. We do not run third-party tracking scripts on the citation builder. If you want to wipe your bibliography, click Clear all (or use your browser’s "Clear site data" feature for a hard reset). If you want to back it up, the Download .txt or Download .bib buttons give you a portable copy you can drop into Dropbox, Drive, or just an email to yourself.
## When AMA Is — and Is Not — the Right Choice
Use AMA when you are submitting to a JAMA-family journal, when an instructor or supervisor specifies AMA explicitly, or when an editor or style guide names the AMA Manual of Style. For nearly all other medical and health-science journals, AMA, Vancouver, or "ICMJE numerical" is acceptable — and AMA is the safest default. Do not mix styles within a single document: pick one before you start writing, configure your reference manager, and run the whole bibliography through this tool at the end as a final pass to catch formatting mistakes that crept in.
## What Else We Plan to Add
This page currently focuses on AMA 11 because that is the most-requested style in the medical sciences. APA 7, MLA 9, Chicago/Turabian, Harvard, IEEE, and Vancouver generators are on the roadmap and will share the same autocite pipeline (CrossRef + PubMed + OpenLibrary + URL scrape + YouTube oEmbed). The reference list will be exportable across styles in a future update so that switching from one style guide to another at submission time is a one-click operation. Until then, AMA 11 — done right, done free, done without an account.