APA (7th ed.) Citation

Cisco Networking Academy Program & Cisco Systems, Inc. (2003). Cisco Networking Academy Program: CCNA 3 and 4 companion guide (3rd ed.). Cisco.

Chicago Style (17th ed.) Citation

Cisco Networking Academy Program and Inc Cisco Systems. Cisco Networking Academy Program: CCNA 3 and 4 Companion Guide. 3rd ed. Indianapolis, Ind.: Cisco, 2003.

MLA (9th ed.) Citation

Cisco Networking Academy Program and Inc Cisco Systems. Cisco Networking Academy Program: CCNA 3 and 4 Companion Guide. 3rd ed. Cisco, 2003.