APA (7th ed.) Citation

U.S. North American Bird Conservation Initiative, Geological Survey (U.S.), U.S. Fish and Wildlife Service, Association of Fish & Wildlife Agencies, Cornell University. Laboratory of Ornithology, Klamath Bird Observatory, . . . Nature Conservancy (U.S.). (2009). The state of the birds: United States of America. U.S. North American Bird Conservation Initiative.

Chicago Style (17th ed.) Citation

U.S. North American Bird Conservation Initiative, Geological Survey (U.S.), U.S. Fish and Wildlife Service, Association of Fish & Wildlife Agencies, Cornell University. Laboratory of Ornithology, Klamath Bird Observatory, National Audubon Society, and Nature Conservancy (U.S.). The State of the Birds: United States of America. Washington, DC: U.S. North American Bird Conservation Initiative, 2009.

MLA (9th ed.) Citation

U.S. North American Bird Conservation Initiative, et al. The State of the Birds: United States of America. U.S. North American Bird Conservation Initiative, 2009.