First, check to see which citation style you are expected to use for your assignment.

If no citation style is required, see building citations to learn how to cite using various styles and source types.

Our general recommendation is:

• List your references in a slide at the end of the PowerPoint presentation.
• Use in-text citations throughout your presentation where applicable.

If your instructor has different instructions or preferences for citing in your presentation, please follow their advice. After all, they're the ones who will be marking your assignment!