APA (7th ed.) Citation

Gaines, C., & Butler, G. (1980). Staying hard: The only exercise book you will ever need. Kenan Press.

Chicago Style (17th ed.) Citation

Gaines, Charles, and George Butler. Staying Hard: The Only Exercise Book You Will Ever Need. New York: Kenan Press, 1980.

MLA (9th ed.) Citation

Gaines, Charles, and George Butler. Staying Hard: The Only Exercise Book You Will Ever Need. Kenan Press, 1980.