Vacca, J. R., & Ellis, S. (2005). Firewalls : jumpstart for network and systems administrators / John R. Vacca, Scott R. Ellis: Jumpstart for network and systems administrators. Elsevier Digital Press.
Chicago Style (17th ed.) CitationVacca, John R., and Scott Ellis. Firewalls : Jumpstart for Network and Systems Administrators / John R. Vacca, Scott R. Ellis: Jumpstart for Network and Systems Administrators. Amsterdam ; London: Elsevier Digital Press, 2005.
MLA (9th ed.) CitationVacca, John R., and Scott Ellis. Firewalls : Jumpstart for Network and Systems Administrators / John R. Vacca, Scott R. Ellis: Jumpstart for Network and Systems Administrators. Elsevier Digital Press, 2005.
Warning: These citations may not always be 100% accurate.