APA style is the main style in many social science and health fields.
Publication manual of the American Psychological Association Call Number: BF76.7 .P83 2010
Concise Rules of APA Style Call Number: BF76.7 .C66 2010
Information on APA style may be found at these websites:
Online Writing Lab (OWL) at Purdue UniversityOffical APA Style Guide (Published by APA)