APA (7th ed.) Citation

Denhardt, R. M. (1975). The horse of the Americas (New ed., rev. and enl.). University of Oklahoma Press.

Chicago Style (17th ed.) Citation

Denhardt, Robert M. The Horse of the Americas. New ed., rev. and enl. Norman: University of Oklahoma Press, 1975.

MLA (8th ed.) Citation

Denhardt, Robert M. The Horse of the Americas. New ed., rev. and enl. University of Oklahoma Press, 1975.