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AMA Style (summary)
The summary about AMA citing style compiled by the University of Illinois at Urbana-Champagne.
Citing Medicine, 2nd edition by
Publication Date: Karen Patrias; Dan Wendling, Technical Editor.
E-book from National Library of Medicine, National Institutes of Health.
NLM Citing Style
The official site about NLM citing style from National Library of Medicine.
APA Citing Style
The official website of APA citing style from by American Psychological Association.
Resources of the APA format from Purdue University Writing Lab.
APA Style Documentation Guide
APA style documentation guide collected by the Writing Center, the University of Wisconsin.
APA Style: social sciences
an overview guide for APA style from Research and Documentation Online website.