Cioara, J., Cavanaugh, M. J., & Krake, K. A. (2009). CCNA voice official exam certification guide. Cisco Press.
Chicago Style (17th ed.) CitationCioara, Jeremy, Michael J. Cavanaugh, and Kris A. Krake. CCNA Voice Official Exam Certification Guide. Indianapolis, Ind.: Cisco Press, 2009.
MLA (8th ed.) CitationCioara, Jeremy, et al. CCNA Voice Official Exam Certification Guide. Cisco Press, 2009.
Warning: These citations may not always be 100% accurate.