APA (7th ed.) Citation

Halleen, G. (2011). CCNP security IPS 642-627 quick reference. Cisco Press.

Chicago Style (17th ed.) Citation

Halleen, Gary. CCNP Security IPS 642-627 Quick Reference. Indianapolis, Ind: Cisco Press, 2011.

MLA (9th ed.) Citation

Halleen, Gary. CCNP Security IPS 642-627 Quick Reference. Cisco Press, 2011.

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