If certain material is inappropriate to the body of the paper or is distracting to the reader, it is beneficial to include an appendix section to an APA paper. Only include an appendix section if it would help the reader to understand the study. Suitable materials for the appendix section include:
A paper can have one or more appendix. In the text, refer to each appendix in the order in which they are mentioned in the text and label it "Appendix" or "Appendix A, Appendix B" if there are more than one appendix. Each appendix has its own page at the end of the paper. Double-space and center the title of the apendix.