APA (7th ed.) Citation

Lewis, M. (2007). CCIE voice exam quick reference sheets. Cisco Press.

Chicago Style (17th ed.) Citation

Lewis, Mark. CCIE Voice Exam Quick Reference Sheets. Indianapolis, Ind: Cisco Press, 2007.

MLA (9th ed.) Citation

Lewis, Mark. CCIE Voice Exam Quick Reference Sheets. Cisco Press, 2007.

Warning: These citations may not always be 100% accurate.