a) One of the sources that I am going to use is Petersons Field Guide to Western Birds
b) This peer-reviewed academic material, as Roger Peterson is a distinguished academic and an expert in his field.
- The book includes in text citations.
- Includes a bibliography (although in the introduction of the book instead of the appendix)
- Peter Alden et al, reviewed the text
Has the characteristic of being written by an expert in the field- Roger Peterson is one of the world most celebrated naturalists. His first field guide as published at the age of 23 and has received more than two dozen honorary degrees, as well as the presidential medal of freedom.
Peterson, R., DiGiorgio, M., & Peterson, R. Peterson field guide to birds of Western North America. Boston: Houghton Mifflin Company.
