Cioara, J., Cavanaugh, M. J., & Krake, K. A. (2009). CCNA voice official exam certification guide. Cisco Press.
Style de citation Chicago (17e éd.)Cioara, Jeremy, Michael J. Cavanaugh, et Kris A. Krake. CCNA Voice Official Exam Certification Guide. Indianapolis, Ind.: Cisco Press, 2009.
Style de citation MLA (8e éd.)Cioara, Jeremy, et al. CCNA Voice Official Exam Certification Guide. Cisco Press, 2009.
Attention : ces citations peuvent ne pas être correctes à 100%.