APA (7th ed.) Citation

Systems, C. (2005). CCNA 1 And 2: Companion Guide. Cisco Press.

Chicago Style (17th ed.) Citation

Systems, Cisco. CCNA 1 And 2: Companion Guide. Cisco Press, 2005.

MLA (8th ed.) Citation

Systems, Cisco. CCNA 1 And 2: Companion Guide. Cisco Press, 2005.

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