na INLIS000000000000531 20131119132529.0 $a 979-533-980-X $0010-111300000000467 $a 005.8 $a 1 $a 005.8 SIT H C.2 $a Eryanto Sitorus $a Hacker dan Keamanan $a ke-1 $a Yogyakarta $b Andi $c 2003 $a ARPUS Magetan $a 20.039-0 $a 20.039-0