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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUdvardy, Miklos D. F., John Farrand, और Miklos D. F. Udvardy. National Audubon Society Field Guide to North American Birds. Rev. ed. New York: Knopf : Distributed by Random House, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUdvardy, Miklos D. F., et al. National Audubon Society Field Guide to North American Birds. Rev. ed. Knopf : Distributed by Random House, 1994.
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