APA (7th ed.) Citation

Cisco Systems Inc, Cisco, & Cisco Networking Academy Program. (2005). Cisco Networking Academy Program: CCNA 1 and 2 companion guide (3rd ed. rev.). Cisco Press.

Chicago Style (17th ed.) Citation

Cisco Systems Inc, Cisco, and Cisco Networking Academy Program. Cisco Networking Academy Program: CCNA 1 and 2 Companion Guide. 3rd ed. rev. Indianapolis, Ind.: Cisco Press, 2005.

MLA (8th ed.) Citation

Cisco Systems Inc, et al. Cisco Networking Academy Program: CCNA 1 and 2 Companion Guide. 3rd ed. rev. Cisco Press, 2005.