na INLIS000000000043211 20161115141732.0 $a 979-533-980-X $0010-111600000002234 $a 005.8 SIT h C.3 $a Eryanto Sitorus $a Hacker dan Keamanan $a ke-1 $a Yogyakarta $b Andi $c 2003 $a ARPUS Magetan $a 20.038-0