APA (7th ed.) Citation

Time-Life Books, Trachtman, P., Rusell, C. M., & Zogbaum, R. F. (1974). The gunfighters. Time-Life Books.

Chicago Style (17th ed.) Citation

Time-Life Books, Paul Trachtman, Charles M. Rusell, and Rufus Fairchild Zogbaum. The Gunfighters. New York: Time-Life Books, 1974.

MLA (9th ed.) Citation

Time-Life Books, et al. The Gunfighters. Time-Life Books, 1974.