Ziegler, R. L. (2000). Linux Firewalls. Indianapolis, Ind: New Riders.
Trích dẫn kiểu ChicagoZiegler, Robert L. Linux Firewalls. Indianapolis, Ind: New Riders, 2000.
MLA引文Ziegler, Robert L. Linux Firewalls. Indianapolis, Ind: New Riders, 2000.
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