APA (7th ed.) Citation

Garrison, W., & Tullius, J. (1988). Once a cowboy. Random House.

Chicago Style (17th ed.) Citation

Garrison, Walt, and John Tullius. Once a Cowboy. New York: Random House, 1988.

MLA (9th ed.) Citation

Garrison, Walt, and John Tullius. Once a Cowboy. Random House, 1988.