See section 7.05 on Doctoral Dissertations and Master's Theses (p.207-208). There are a few variations, depending on where you retrieve the document from, so be mindful of the different rules in this section.
|All information and page number references are based on the 6th edition of the Publication Manual of the American Psychological Association (2009/10).|
Need a copy of the Publication Manual? Click here for details. See Also: APA Style Guide to Electronic References, Sixth Edition