A parenthetical (OR in-text) reference is a reference within the body of your paper to one of the sources listed in your Works Cited or Reference List . It indicates exactly what you derived from the source, and specifically where it can be found. You need to write a parenthetical, or "in-text" reference whether you quote the material directly, paraphrase it in your own words, or refer to an idea derived from the material. Typically it includes the author(s) (or title if there is no author) and page number(s).
For internet sources, sometimes paragraph numbers are used. EXAMPLE: (Segat 23)