Hucaby, D., Garneau, D., & Sequeira, A. (2012). CCNP security firewall 642-617 official cert guide. Cisco Press.
Cita Chicago (17th ed.)Hucaby, Dave, Dave Garneau, i Anthony Sequeira. CCNP Security Firewall 642-617 Official Cert Guide. Indianapolis, Ind: Cisco Press, 2012.
Cita MLA (9th ed.)Hucaby, Dave, et al. CCNP Security Firewall 642-617 Official Cert Guide. Cisco Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.