Cita APA (7a ed.)

Schulz, D. (2011). CCNP Voice CIPT2 642-457: Quick reference (2nd ed.). Cisco Press.

Cita Chicago Style (17a ed.)

Schulz, Dave. CCNP Voice CIPT2 642-457: Quick Reference. 2nd ed. Indianapolis, Ind.: Cisco Press, 2011.

Cita MLA (8a ed.)

Schulz, Dave. CCNP Voice CIPT2 642-457: Quick Reference. 2nd ed. Cisco Press, 2011.