APA (7th ed.) Citation

Cooke, C. W. (1955). Some Cretaceous echinoids from the Americas. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Cooke, C. Wythe. Some Cretaceous Echinoids from the Americas. Washington: U.S. Govt. Print. Off, 1955.

MLA (9th ed.) Citation

Cooke, C. Wythe. Some Cretaceous Echinoids from the Americas. U.S. Govt. Print. Off, 1955.

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