APA (7th ed.) Citation

Simpson, G. G. (1934). A new notoungulate from the early Tertiary of Patagonia. American Museum of Natural History.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. A New Notoungulate from the Early Tertiary of Patagonia. New York City: American Museum of Natural History, 1934.

MLA (9th ed.) Citation

Simpson, George Gaylord. A New Notoungulate from the Early Tertiary of Patagonia. American Museum of Natural History, 1934.