How do I reference an image in an appendix taken from another source?

Just as in the main body of text, a table or figure in an appendix may be taken from an existing source. This source is mentioned in the same reference list as the sources referred to in the main body of text. No separate reference list is therefore created for the appendices, even if the reference list appears before the appendices.

How you reference tables and figures depends on the original source. See the video APA guidelines - Images: tables and figures for more information.