APA (7th ed.) Citation

Buwalda, J. P., & Lewis, G. E. (1955). A new species of Merychippus. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Buwalda, John P., and G. Edward Lewis. A New Species of Merychippus. Washington: U.S. Govt. Print. Off, 1955.

MLA (9th ed.) Citation

Buwalda, John P., and G. Edward Lewis. A New Species of Merychippus. U.S. Govt. Print. Off, 1955.