APA (7th ed.) Citation

Wheeler, B. K., & Clark, W. S. (1999). A photographic guide to North American raptors. Academic Press.

Chicago Style (17th ed.) Citation

Wheeler, Brian K., and William S. Clark. A Photographic Guide to North American Raptors. San Diego, Calif.: Academic Press, 1999.

MLA (9th ed.) Citation

Wheeler, Brian K., and William S. Clark. A Photographic Guide to North American Raptors. Academic Press, 1999.