APA (7th ed.) Citation

Boyd, L., & Houpt, K. A. (1994). Przewalski's horse: The history and biology of an endangered species. State University of New York Press.

Chicago Style (17th ed.) Citation

Boyd, Lee, and Katherine A. Houpt. Przewalski's Horse: The History and Biology of an Endangered Species. Albany: State University of New York Press, 1994.

MLA (9th ed.) Citation

Boyd, Lee, and Katherine A. Houpt. Przewalski's Horse: The History and Biology of an Endangered Species. State University of New York Press, 1994.