na INLIS000000000012530 20140227135201.0 a ||| | 170530| ||| | $a 979-533-980-X $a 0010-021400000002942 $a 005.8 $a 1 $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