APA (7th ed.) Citation

Auel, J. M. (1983). The valley of horses: A novel. Bantam Books.

Chicago Style (17th ed.) Citation

Auel, Jean M. The Valley of Horses: A Novel. New York [etc.]: Bantam Books, 1983.

MLA (9th ed.) Citation

Auel, Jean M. The Valley of Horses: A Novel. Bantam Books, 1983.