APA (7th ed.) Citation

Keen, A. M. (1958). Sea shells of tropical west America: Marine mollusks from Lower California to Columbia. Stanford University Press.

Chicago Style (17th ed.) Citation

Keen, A. Myra. Sea Shells of Tropical West America: Marine Mollusks from Lower California to Columbia. Stanford, Calif: Stanford University Press, 1958.

MLA (9th ed.) Citation

Keen, A. Myra. Sea Shells of Tropical West America: Marine Mollusks from Lower California to Columbia. Stanford University Press, 1958.