Remember to cite when:
You do NOT have to cite when it is:
Plagiarism is the "stealing" or use of someone else's work without attribution - i.e., treating someone else's work as if it were your own. This is a very serious charge and can result in severe disciplinary action, including a fail grades and possibly even expulsion.
To avoid plagiarism, cite your sources! Citations not only give proper credit to others for their ideas, but they indicate to your reader what resources were referred to when writing your paper.
For more information on plagiarism, please take a look at the items below: