Cita APA (7a ed.)

Cioara, J., Cavanaugh, M. J., & Krake, K. A. (2009). CCNA voice official exam certification guide. Cisco Press.

Cita Chicago Style (17a ed.)

Cioara, Jeremy, Michael J. Cavanaugh, y Kris A. Krake. CCNA Voice Official Exam Certification Guide. Indianapolis, Ind.: Cisco Press, 2009.

Cita MLA (8a ed.)

Cioara, Jeremy, et al. CCNA Voice Official Exam Certification Guide. Cisco Press, 2009.