Help with CD'S please!?

Ok..so I have to do this power point for Science and I have to research CD's so if any of you know How CD's are made, How they work, and the material in a CD.. Put a link please! Oh and it says I have to write a bibliography so if you can please help me! I don't really understand it and my teacher said I had to figure it out.. By the way its kinda due tomorrow D: