User talk:Kycrappie

I want to use several wiki commons pictures that are in the public domain in a book. I have a credits/resources page at the end acknowleding the sources I have used. I am not understanding the terminology or exact format of how to do this. Should the picture within the book have an identifying number or letter referencing to the resource page; and, how should the credit or tag or whatever be written. Something like (wiki commons Mona Lisa pd-art????) or  http://commons.wikimedia.org/wiki/File:Altamira-1880. In simple terms, how should the credit of the picture be listed in my resource page? John