Any words, ideas or images that you do not create yourself must be properly credited to avoid plagiarism.
Citing information sources acknowledges the origin of your information and it provides support and credibility to your work by showing evidence of your research.
A citation is a reference to the source of an idea, information or image. It typically includes enough identifying information, such as the author, title, date, publication format, etc. Access the CCSF Library Citing Sources page for handouts and link on how to cite a source.
Check with your professor to find out which citation style is required. While most disciplines use MLA or APA format, Political Science has it's own style guide, called the American Political Science Association (APSA) format. This book is available at Rosenberg Library at the Ocean Campus, and covers citation in political science.
Here are some web resources for citation examples and style guides.