No Inv.: 88065-88074/P/Perp/04/10c~114238/P/Perp/08/1c
No Inv.: 111575-111577/P/Perp/07/3c
Judul asli :"The Essence of information systems"
No Inv.: 86789-86791/P/Perp/03/3c~114433-114437/P/Perp/08/5c~118545-118547/P/Perp/09/3c
No Inv.: 118297-118299/P/Perp/09/3c