In addition to keeping oneself out of trouble with copyright compliance rules and university conduct policies, citing your sources allows others to reproduce and build on your research, creating new scholarship.
ASU Library: Citation Style (APA | Chicago | MLA | Turabian)
An overview of several of the most frequently used citation styles as well as access to additional styles used within the scientific disciplines.
The OWL at Purdue University (APA | MLA | Chicago)
The oldest and one of the most comprehensive online writing labs.
The Basic of APA Style
Tutorial created by American Psychological Association.