Information on what to include in an appendix and how to format it can be found in Section 2.13, Appendices and Supplemental Materials (p.38-39).
The manual states that each appendix should begin on a separate page and the word "Appendix" should be centred on the page. Please see p.39 for more information on how to format multiple appendices.
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