APA (7th ed.) Citation

Hooper, H. (2012). CCNP security VPN 642-648 official cert guide. Cisco Press.

Chicago Style (17th ed.) Citation

Hooper, Howard. CCNP Security VPN 642-648 Official Cert Guide. Indianapolis, Ind: Cisco Press, 2012.

MLA (9th ed.) Citation

Hooper, Howard. CCNP Security VPN 642-648 Official Cert Guide. Cisco Press, 2012.

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