Different citation styles are used by different disciplines and subject areas. Each frequently-used style below links to a guide about how to use that style in writing and editing papers, and lists disciplines and subject areas that commonly use them. The instructor assigning your work is always the authority on what style to use for a particular assignment.
Chicago Manual of Style Online
-Includes the full text of both the 16th (2010) and 17th editions (2017)
Chicago Manual of Style Quick Guide
-Contains examples of how to cite various content types (books, articles, websites, blogs, etc.)
OWL Purdue Online Writing Lab
-Contains additional examples of how to cite various content types (books, articles, websites, blogs, etc.)