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.