Format:
Author last name, first initial. (Date). Title of the PowerPoint [PowerPoint slides]. Host site. URL
Example:
Thomes, C. (n.d.). UMGC Library APA citation basics [PowerPoint slides]. University of Maryland Global Campus. https://libguides.umgc.edu/ld.php?content_id=68264148
In-text citation:
(Thomes, n.d.)