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APA Academic Writer
Ultimate resource on APA Style which includes guides, tutorials, and research tools.
Chicago Manual of Style Online
The online edition of the Chicago Manual of Style (CMOS) provides the full text in HTML or PDF formats as appropriate. The index makes it easier to navigate appropriate sections.
Citation Guides from DU's Writing Center
This site provides tips for citing as well as links to documents you can download for various citation styles (e.g., APA, Chicago, MLA).
Purdue OWL (Online Writing Lab)
The Purdue OWL provides instructions for citing print or electronic images in APA, MLA, and Chicago styles.
APA Style Blog for 7th Edition
The APA Style blog is the official companion to the Publication Manual of the American Psychological Association, Seventh Edition. Use the search box to find tips on how to cite blogs, facebook, twitter, etc.
Zotero is a free, easy-to-use program to help you collect, manage, and cite your research sources. It lives right where you do your work — in the web browser itself.
This source generates citations in numerous styles, including APA, Chicago, MLA, and Turabian.
Free bibliography generator that can automatically format citations in a variety of styles.