National American University Online Library: In-text Citation

• The in-text citation is in the text or body of the paper/discussion post. When using APA format, use the author-date (Author, publication year) method of in-text citation. This means that the author's last name and the year of publication for the source should appear in the text, for example, (Jones, 1998), and a complete reference should appear in the reference list at the end of the paper. 
• If you are directly quoting from a work, you will need to include the page number for the reference (preceded by "p.") after the author's name, and date ( Author, publication year, p. 2). 
  Examples:

According to Jones (1998), "Students often had difficulty using APA style, especially when it was their first time" (p. 199).

Jones (1998) found "students often had difficulty using APA style" (p. 199); what implications does this have for teachers?

• Make sure that the spelling of author names and the publication dates in reference list entries match those in the corresponding in-text citations.
• Cite only works that you have read and ideas that you have incorporated into your writing. 
• Cite primary sources when possible, and cite secondary sources sparingly.
• Cite sources to document all facts and figures that you mention that are not common knowledge.
• To cite a specific part of a source, provide an author–date citation for the work plus information about the specific part.
• Even when sources cannot be retrieved (e.g. because they are personal communications), still credit them in the text (however, avoid using online sources that are no longer recoverable).