In case you need more information about AMA citation and more examples than is on this research guide you can look at these other research guides at other libraries [note: this list is not exhaustive]:
University of St. Augustine for Health Sciences: https://mym.cdn.usa.edu/WritingCenter/AMA_References_11th.pdf
AND, OF COURSE, FEEL FREE TO ASK A YORK COLLEGE LIBRARIAN FOR HELP.