In-text citations tell readers that additional information about the outside sources you have used in your research can be found on the reference page at the end of your paper. Remember that each in-text citation in the body of your paper must be listed on your reference page and vice versa. The APA Manual lists two exceptions to this rule: (1) classical works that are standardized (e.g., religious and ancient texts); and (2) personal communication that cannot be readily retrieved (e.g., private emails, letters, and memos).
Here is a list of common source types, with each linked to a page containing format instructions and best practices.
Formats for Quotation, Paraphrase, and Summary
Direct Quotes of 40 Words or More
Social Media and Online Forums
For more information on source types and in-text citations, consult
Publication Manual of the American Psychological Association, 7e.