APA 6th Edition Style Guide

When a work has six or more authors, in the paper body, cite only the last name of the first author, followed by et al. (Bryn et al., 2009, pp. 6-7). For seven or fewer authors in the references, write out authors’ last names with first- and middle-name initials, up to the seventh. For eight or more, write out authors’ last names with initials up to the first six, insert an ellipsis ... ................
................