APA (7th ed.) Citation

Simpson, G. G. (1932). Cochilius volvens from the Colpodon beds of Patagonia. The American Museum of Natural History.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. Cochilius Volvens from the Colpodon Beds of Patagonia. New York City: The American Museum of Natural History, 1932.

MLA (9th ed.) Citation

Simpson, George Gaylord. Cochilius Volvens from the Colpodon Beds of Patagonia. The American Museum of Natural History, 1932.