Roland, J. F. (2003). CCSP cisco secure VPN exam certification guide: CCSP self-study. Indianapolis: Cisco Press.
Chicago Style citaatRoland, John F. CCSP Cisco Secure VPN Exam Certification Guide: CCSP Self-study. Indianapolis: Cisco Press, 2003.
MLA citatieRoland, John F. CCSP Cisco Secure VPN Exam Certification Guide: CCSP Self-study. Indianapolis: Cisco Press, 2003.
Let op: Deze citaties zijn niet altijd 100% accuraat.