When using the APA system of documentation, include both an in-text citation and a list of references at the end of the research project. In-text citations tell your readers where the ideas or words you have borrowed come from, and the entries in the list of references allow readers to locate your sources so that they can read more about your topic.
The most common types of in-text citations follow. For other, less common citation types, consult the Publication Manual of the American Psychological Association, Sixth Edition. Most libraries will own a copy.