APA (7th ed.) Citation

Allen, G. B. (2002). Ultrasafe: A guide to safer rock climbing (1. ed.). PP Preventive Press.

Chicago Style (17th ed.) Citation

Allen, George B. Ultrasafe: A Guide to Safer Rock Climbing. 1. ed. Highlands Ranch, Colo: PP Preventive Press, 2002.

MLA (9th ed.) Citation

Allen, George B. Ultrasafe: A Guide to Safer Rock Climbing. 1. ed. PP Preventive Press, 2002.