The AMA Manual of Style 11th Edition does call for a DOI:
Here is a quick tip for citing electronic resources in the 11th edition:
- When the DOI is given for a journal article, AMA style prefers that the DOI is cited instead of the URL. If no DOI is given, include the URL. Do not cite both.
- Keep in mind, publishers may present DOIs without linking through a website, such as: doi:10.1001/jama.2017.13737 or through a website, such as: https://doi.org/10.1001/jama.2017.13737. The AMA Manual of Style recommends presenting DOIs as the former (eg, doi:10.1001/jama.2017.13737). The reason being is that a DOI presented in this way links users directly to the permanent article or object the DOI is identifying regardless of any site change.
- Complete information on how to cite electronic references such as websites or government documents found online can be found in section 3.15 of the AMA Manual of Style [page 95 in the 11th Edition].
The above information is from the New York Medical College's Health Sciences Library's AMA 11 Style Guide.
