Perkins, J., Ridenhour, A., & Kovsky, M. (2009). Attack proof: The ultimate guide to personal protection (2nd ed.). Human Kinetics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerkins, John, Al Ridenhour, और Matt Kovsky. Attack Proof: The Ultimate Guide to Personal Protection. 2nd ed. Champaign, Ill.: Human Kinetics, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPerkins, John, et al. Attack Proof: The Ultimate Guide to Personal Protection. 2nd ed. Human Kinetics, 2009.
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