When you are writing a presentation, such as in PowerPoint, you need to cite your sources. The Writing Support Center has the following advice:
APA does not provide details on how to format a presentation. However, some standards are expected. Consult with your instructor for details on their preferences.
Instead of a title page, start with a title slide with the presenters' names and school name.
Use in-text citations as normal, either on the slide or in the notes field below. Ask your professor which they prefer.
End with a References slide with APA formatted references.