One author:
Parenthetical citation: (Hollander, 2020).
Narrative citation: Hollander (2020) articulated….
Two authors:
Parenthetical citation: (Beshears & Rand, 2020).
Narrative citation: Beshears and Rand (2020) articulated….
Three or more authors:
Parenthetical citation: (Beshears et al., 2020).
Narrative citation: Beshears et al. (2020) articulated….
If there are 3 or more authors, use et al. for the first and subsequent citing of the work.