na INLIS000000000000546 20131119140611.0 $a 979-533-980-x $0010-111300000000482 $a 005.8 $a 1 $a 005.8 SIT H 4 $a eryanto sitorus $a hakcer & keamanan $a ke-1 $a Yogyakarta $b ANDI $c 2003 $a ARPUS MAGETAN $a 20.037-0 $a 20.037-0