PowerPoint 2007 does not have a tool that creates references, but you can still insert them on a slide and add a reference list to the bottom of the slide using tools that PowerPoint does have.

Create citations with an online service and copy and paste references to your PowerPoint slides. It is one of the easiest ways to cite sources in presentations or any other document. Here ...

Our visual guide helps you find the most useful commands on the Ribbon in PowerPoint ... and click New Slide in the Slides group, or press Alt-N, then S and I. Keep this reference guide handy ...