APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Cisco Networking Academy Program and Inc Cisco Systems. CCNA 1 and 2 Companion Guide. Rev. 3rd ed. Cisco Press, 2005.