APA (7th ed.) Citation

Watkins, M., & Wallace, K. (2008). 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, IN: Cisco Press, 2008.

MLA (9th ed.) Citation

Watkins, Michael, and Kevin Wallace. CCNA Security Official Exam Certification Guide. Cisco Press, 2008.

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