APA (7th ed.) Citation

National Geographic Society (U.S.) & Alderfer, J. K. (2006). National Geographic field guide to birds. National Geographic.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.) and Jonathan K. Alderfer. National Geographic Field Guide to Birds. Washington, D.C.: National Geographic, 2006.

MLA (8th ed.) Citation

National Geographic Society (U.S.) and Jonathan K. Alderfer. National Geographic Field Guide to Birds. National Geographic, 2006.

Warning: These citations may not always be 100% accurate.