Efisitek.com. (2007). Kumpulan Program Antivirus dan Firewall. Yrama Widya.
Chicago Style (17th ed.) CitationEfisitek.com. Kumpulan Program Antivirus Dan Firewall. Yrama Widya, 2007.
MLA (8th ed.) CitationEfisitek.com. Kumpulan Program Antivirus Dan Firewall. Yrama Widya, 2007.
Warning: These citations may not always be 100% accurate.