APA (7th ed.) Citation

National Zoological Park (U.S.) & Skrentny, J. E. (1976). Zoobook (First edition.). Smithsonian Institution Press.

Chicago Style (17th ed.) Citation

National Zoological Park (U.S.) and Jan E. Skrentny. Zoobook. First edition. Washington: Smithsonian Institution Press, 1976.

MLA (9th ed.) Citation

National Zoological Park (U.S.) and Jan E. Skrentny. Zoobook. First edition. Smithsonian Institution Press, 1976.