APA (7th ed.) Citation

Empson, S. A. (2008). CCNA portable command guide (2nd ed.). Cisco Press.

Chicago Style (17th ed.) Citation

Empson, Scott Author. CCNA Portable Command Guide. 2nd ed. [Place of publication not identified]: Cisco Press, 2008.

MLA (9th ed.) Citation

Empson, Scott Author. CCNA Portable Command Guide. 2nd ed. Cisco Press, 2008.