Cita APA (7th ed.)

VACCA, J. R. (2005). FIREWALLS JUMPSTART FOR NETWORK SYSTEMS ADMINISTRATORS. ELSEVIER.

Cita Chicago (17th ed.)

VACCA, J R. FIREWALLS JUMPSTART FOR NETWORK SYSTEMS ADMINISTRATORS. NEW DELHI: ELSEVIER, 2005.

Cita MLA (9th ed.)

VACCA, J R. FIREWALLS JUMPSTART FOR NETWORK SYSTEMS ADMINISTRATORS. ELSEVIER, 2005.