APA (7th ed.) Citation

Watkins, M., & Wallace, K. (2011). CCNA security: Official exam certification guide. Cisco Press.

Chicago Style (17th ed.) Citation

Watkins, Michael, and Kevin Wallace. CCNA Security: Official Exam Certification Guide. Indianapolis: Cisco Press, 2011.

MLA (9th ed.) Citation

Watkins, Michael, and Kevin Wallace. CCNA Security: Official Exam Certification Guide. Cisco Press, 2011.

Warning: These citations may not always be 100% accurate.