APA (7th ed.) Citation

National Geographic Society (U.S.) & Bailey, J. H. (1983). Giants from the past: The age of mammals. National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.) and Joseph H. Bailey. Giants from the Past: The Age of Mammals. [Washington, D.C.]: National Geographic Society, 1983.

MLA (9th ed.) Citation

National Geographic Society (U.S.) and Joseph H. Bailey. Giants from the Past: The Age of Mammals. National Geographic Society, 1983.