Cita APA (7th ed.)

Newell, N. D., & Boyd, D. W. (1970). Oyster-like permian bivalvia. American Museum of Natural History.

Cita Chicago (17th ed.)

Newell, Norman D., i Donald W. Boyd. Oyster-like Permian Bivalvia. New York: American Museum of Natural History, 1970.

Cita MLA (8th ed.)

Newell, Norman D., i Donald W. Boyd. Oyster-like Permian Bivalvia. American Museum of Natural History, 1970.