APA (American Psychological Association) Style consists of rules or guidelines to regulate writing formats of text citations, reference lists, and charts. APA 7th edition was published in October 2019 (Paper collection).
AMA Manual of Style is created by the Journal of the American Medical Association (JAMA). The latest edition is the 11th edition.
The International Committee of Medical Journal Editors (ICMJE) Recommendations contain recommendations for the conduct, reporting, editing and publication of scholarly work in medical journals. ICMJE Recommendations were originally called Uniform Requirements. See Samples of Formatted References for Authors of Journal Articles on the National Library of Medicine website.