If you are looking to cite a book with more than five authors or editors, follow the same format as three to five authors/editors. The only difference is with in-text citations. Even in your first in-text citation, you can shorten to the last name of the first author followed by et al., and the year. For example: Rodgers, Chung, Hightower, Collins, Long, Carr, & Thomas (2016) would be (Rodgers et al., 2016) starting with the first in-text citation. See the table below for more information or page 177 of the APA Manual, 6th Edition.
Citation information has been adapted from the APA Manual (6th Edition). Please refer to pages 176-177 and 184 of the APA Manual (6th Edition) for more information.