Cita APA (7a ed.)

Udvardy, M. D., Farrand, J., Wilson, A., & Hogan, L. (1994). National Audubon Society field guide to North American birds: Western region (2nd ed., fully rev.). Knopf.

Cita Chicago Style (17a ed.)

Udvardy, Miklos D.F, John Farrand, Amanda Wilson, y Lori Hogan. National Audubon Society Field Guide to North American Birds: Western Region. 2nd ed., fully rev. New York: Knopf, 1994.

Cita MLA (9a ed.)

Udvardy, Miklos D.F, et al. National Audubon Society Field Guide to North American Birds: Western Region. 2nd ed., fully rev. Knopf, 1994.