APA (7th ed.) Citation

Gregory, W. K., & Hellman, M. (1926). The dentition of Dryopithecus and the origin of man. The American Museum of Natural History.

Chicago Style (17th ed.) Citation

Gregory, William K., and Milo Hellman. The Dentition of Dryopithecus and the Origin of Man. New York: The American Museum of Natural History, 1926.

MLA (9th ed.) Citation

Gregory, William K., and Milo Hellman. The Dentition of Dryopithecus and the Origin of Man. The American Museum of Natural History, 1926.