APA (7th ed.) Citation

Simpson, G. G. (1935). Early and middle Tertiary geology of the Gaiman region, Chubut, Argentina. American Museum of Natural History.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. Early and Middle Tertiary Geology of the Gaiman Region, Chubut, Argentina. New York City: American Museum of Natural History, 1935.

MLA (9th ed.) Citation

Simpson, George Gaylord. Early and Middle Tertiary Geology of the Gaiman Region, Chubut, Argentina. American Museum of Natural History, 1935.