APA Citation

Ernst, C. H., & Barbour, R. W. (1989). Turtles of the world. Washington, D.C.: Smithsonian Institution Press.

Chicago Style Citation

Ernst, Carl H., and Roger W. Barbour. Turtles of the World. Washington, D.C.: Smithsonian Institution Press, 1989.

MLA Citation

Ernst, Carl H., and Roger W. Barbour. Turtles of the World. Washington, D.C.: Smithsonian Institution Press, 1989.

Warning: These citations may not always be 100% accurate.