APA (7th ed.) Citation

Cook, H. J. (1930). New rhinoceroses from the Pliocene of Colorado and Nebraska.

Chicago Style (17th ed.) Citation

Cook, Harold J. New Rhinoceroses from the Pliocene of Colorado and Nebraska. Denver, Colo, 1930.

MLA (9th ed.) Citation

Cook, Harold J. New Rhinoceroses from the Pliocene of Colorado and Nebraska. 1930.