AMA - stands for American Medical Association. This citation style is used primarily in the fields of medicine and science.
You may find yourself using Section I Preparing an Articles for Publication > References > 3.15 Electronic Reference often. Sample pages:
Examples of Citations in AMA Style:
Citation for a journal article (see PubMed)
1. Meng YY, Rull RP, Wilhelm M, Lombardi C, Balmes J, Ritz B. Outdoor air pollution and uncontrolled asthma in the San Joaquin Valley, California. J Epidemiol Community Health. 2010;64(2):142-147. doi: 10.1136/jech.2009.083576.
Citation for a report (also referred to the book information and electronic reports)
2. Bengiamin, M, Capitaman JA, and Chang X. (2011). Healthy people 2010: A 2010 profile of health status in the San Joaquin Valley. Fresno, CA: California State University, Fresno; 2011. https://www.fresnostate.edu/chhs/cvhpi/documents/healthy-people-2010-review-12-12-2011.pdf. Accessed September 7, 2015.