General Rules for AMA Citation Style
In Text Citations (See p. 42-43 3.6 in AMA Manual of Style 10th ed)
In text citations are formatted very differently as compared to the APA style; numbers are used within the text instead of the author, year.
Journal Title Abbreviations (See p. 48 3.11.2 in AMA Manual of Style 10th ed)
For reference lists, abbreviate the journal name according to the listing in the National Library of Medicine (NLM) Catalog: https://www.ncbi.nlm.nih.gov/nlmcatalog/journals Enter the title of the journal in the search box.
For example, the official NLM Title Abbreviation for the Journal of Diagnostic Medical Sonography: JDMS is J Diagn Med Sonogr