Udvardy, M. D. F., Farrand, J., & Udvardy, M. D. F. (1994). National Audubon Society field guide to North American birds (Rev. ed.). Knopf : Distributed by Random House.
Chicago Style (17th ed.) CitationUdvardy, Miklos D. F., John Farrand, and Miklos D. F. Udvardy. National Audubon Society Field Guide to North American Birds. Rev. ed. New York: Knopf : Distributed by Random House, 1994.
MLA (8th ed.) CitationUdvardy, Miklos D. F., et al. National Audubon Society Field Guide to North American Birds. Rev. ed. Knopf : Distributed by Random House, 1994.
Warning: These citations may not always be 100% accurate.