Ehrlich, P. R., Dobkin, D. S., & Wheye, D. (1988). The birder's handbook: A field guide to the natural history of North American birds : including all species that regularly breed north of Mexico. Simon & Schuster.

Ehrlich, Paul R., David S. Dobkin, and Darryl Wheye. The Birder's Handbook: A Field Guide to the Natural History of North American Birds : Including All Species That Regularly Breed North of Mexico. New York: Simon & Schuster, 1988.

Ehrlich, Paul R., et al. The Birder's Handbook: A Field Guide to the Natural History of North American Birds : Including All Species That Regularly Breed North of Mexico. Simon & Schuster, 1988.