APA documentation style (in similar fashion to MLA style) calls for "in-text" citations of sources of information to be listed within the text where they are referenced, rather than in footnotes and endnotes, as some systems require.
To assist those who would rather not wade through APA's 272 page Publication Manual, I have broken down and summarized the APA Rules for the Preparation of Manuscripts into three distinct sections as follows:
The purpose of APA in text and parenthetical citations is to give the reader a brief idea as to where you found your information, while they’re in the middle of reading or viewing your project. You may include direct quotes in the body of your project, which are word-for-word quotes from another source. Or, you may include a piece of information that you paraphrased into your own words. These are called parenthetical citations. Both direct quotes and paraphrased information include an in text citation directly following it. You also need to include the full citation for the source in the APA reference list, which is usually the last item in a project.