Cita APA (7a ed.)

Washington, B. (2011). CCNP Voice CAPPS 642-467 Quick Reference (1st edition.). Pearson Education.

Cita Chicago Style (17a ed.)

Washington, Brion. CCNP Voice CAPPS 642-467 Quick Reference. 1st edition. S.l.: Pearson Education, 2011.

Cita MLA (9a ed.)

Washington, Brion. CCNP Voice CAPPS 642-467 Quick Reference. 1st edition. Pearson Education, 2011.