APA (7th ed.) Citation

Simpson, G. G. (1936). A new fauna from the Fort Union of Montana. The American Museum of Natural History.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. A New Fauna from the Fort Union of Montana. New York City: The American Museum of Natural History, 1936.

MLA (9th ed.) Citation

Simpson, George Gaylord. A New Fauna from the Fort Union of Montana. The American Museum of Natural History, 1936.