APA (7th ed.) Citation

Cisco Networking Academy Program Content Provider, Barker, K. A., & Morris, S. C. (2012). CCNA Security 640-554 Official Cert Guide (1st edition.). Cisco Press.

Chicago Style (17th ed.) Citation

Cisco Networking Academy Program Content Provider, Keith Author Barker, and Scott Contributor Morris. CCNA Security 640-554 Official Cert Guide. 1st edition. [Place of publication not identified]: Cisco Press, 2012.

MLA (9th ed.) Citation

Cisco Networking Academy Program Content Provider, et al. CCNA Security 640-554 Official Cert Guide. 1st edition. Cisco Press, 2012.