Answered By: Emily Thornton Last Updated: Mar 16, 2020 Views: 3
In APA style, you can use [square brackets] in some circumstances. It's more common to use (parentheses) though. Here is a nice guide to using brackets and parentheses in APA style, especially the box labeled Parentheses: https://guides.library.nymc.edu/c.php?g=567729&p=4609898.
If you have a copy of the Publication Manual of the American Psychological Association, 6th edition, this information is on pages 93-95.