APA (7th ed.) Citation

Viola, H. J. (1993). Ben Nighthorse Campbell, an American warrior. Orion Books.

Chicago Style (17th ed.) Citation

Viola, Herman J. Ben Nighthorse Campbell, an American Warrior. New York: Orion Books, 1993.

MLA (9th ed.) Citation

Viola, Herman J. Ben Nighthorse Campbell, an American Warrior. Orion Books, 1993.