Roland, J. F. (2003). CCSP cisco secure VPN exam certification guide: CCSP self-study. Indianapolis: Cisco Press.
Dyfyniad Arddull ChicagoRoland, John F. CCSP Cisco Secure VPN Exam Certification Guide: CCSP Self-study. Indianapolis: Cisco Press, 2003.
Dyfyniad MLARoland, John F. CCSP Cisco Secure VPN Exam Certification Guide: CCSP Self-study. Indianapolis: Cisco Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.