APA (7th ed.) Citation

Perkins, J. 1. M. 3., Kovsky, M. ., & Ridenhour, A.. (2009). Attack proof: The ultimate guide to personal protection (2nd ed.). Human Kinetics.

Chicago Style (17th ed.) Citation

Perkins, John 1951 Mar. 31-, Matt Kovsky, and Al Ridenhour. Attack Proof: The Ultimate Guide to Personal Protection. 2nd ed. United States: Human Kinetics, 2009.

MLA (9th ed.) Citation

Perkins, John 1951 Mar. 31-, et al. Attack Proof: The Ultimate Guide to Personal Protection. 2nd ed. Human Kinetics, 2009.