Here is a very helpful video about doing presentations, including best practices for using Powerpoint as well as presentation techniques:

Creating Effective Presentations (materials assembled by Lehigh LIbrary and Technology Services staff members Jarret Brown and Holly Zakos ).

You can also search on the web for freely accessible information about doing presentations.

If you are using Powerpoint or another presentation software, you can put literature references as need on individual slides, or collect them at the end in a final slide, or both.