na INLIS000000000000484 20150323105610.0 9789795339809 010-031500000000227 21. 005 005 SIT h Sitorus, Eryanto 2003 HACKER & KEAMANAN Eryanto Sitorus Ed. 1. Yogyakarta ANDI 2003 vii,168 hlm.: ilus. ;18 cm. Progam Komputer 0794(029884)/PU-KDR/HD/2013