It sounds painful but it doesn’t have to be! Parenthetical documentation or in-text citations means you are telling the reader where you got any information that did not come from inside your own head. This is more obvious when you are directly quoting from a source but it's also needed when you summarize or paraphrase a source and even when you get an idea from somewhere else.
So how do you do it? As the names imply, you are going to put the information about the source in parentheses in the text of your paper (rather than in a footnote, where the source information is at the bottom of the page, or in an endnote, where it goes at the end of your paper).
You only need to list the last name(s) of the author(s) and the page number(s) where you found the quote or information you are using. Make sure the source information in parentheses matches your bibliography at the end of your paper. If an entire portion of your paper is referencing one source, cite the author and page number(s) the first time and then just the number(s) after that. If you are going back and forth between different sources, you need to cite the author each time you switch. In order to avoid plagiarism, it is extremely important that you cite all words and ideas that you get from somewhere else.
**Note that the punctuation for the sentence goes AFTER the final parenthesis, like this: (Ridlen 6-7).
More Information: See pages 174-79 of the 8th edition for further explanation and examples.