APA (7th ed.) Citation

Sauer, T., & Wallace, K. (2011). CCNP Voice CVoice 642-437: Quick reference. Cisco Press.

Chicago Style (17th ed.) Citation

Sauer, Toby, and Kevin Wallace. CCNP Voice CVoice 642-437: Quick Reference. Indianapolis, Ind: Cisco Press, 2011.

MLA (9th ed.) Citation

Sauer, Toby, and Kevin Wallace. CCNP Voice CVoice 642-437: Quick Reference. Cisco Press, 2011.

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