APA (7th ed.) Citation

Stirton, R. A. (1940). Phylogeny of North American equidae. University of California Press.

Chicago Style (17th ed.) Citation

Stirton, R. A. Phylogeny of North American Equidae. Berkeley, CA: University of California Press, 1940.

MLA (9th ed.) Citation

Stirton, R. A. Phylogeny of North American Equidae. University of California Press, 1940.