One of the most frequently used citation reference sites is on the Purdue OWL from Purdue University. It is updated regularly to reflect any changes in APA or MLA format. APA is the citation style employed by the American Psychological Association, and is used primarily in the social sciences. MLA citation style is mainly used within language arts, literature, and cultural studies, among others.
In addition, while it tends to be taught less often to undergraduates than APA and MLA, Chicago style is the preferred citation style of many humanities publications. The current Chicago style guide can be found here: The Chicago Manual of Style Contents. Another important citation consideration is that many journals use a “house style,” which can be an amalgamation of one or more traditional citation styles.
Below are additional citation resources:
The Basics of APA A fast tutorial created by the APA.
APA Electronic Reference Formats from the American Psychological Association.
Examples from Ithaca College library.
APA Examples from the University of Wisconsin at Madison.
APA Exposed a Harvard University tutorial.
MLA Style from the Modern Language Association.
Check Cite from James Madison University.
TCC MLA Video Tutorials