No Inv.: 1423-1425/S/Perp/91/3c
Judul asli :"The Essence of information systems"
No Inv.: 13373-13377/P/Perp/94/5c
No Inv.: 6575-6579/P/Perp/92/5c
No Inv.: 3797-3801/P/Perp/92/5c~2054-2063/P/Perp/96/10c
No Inv.: 4030-4034/P/Perp/92/5c~66869-66870/S/00/2c
No Inv.: 10283-10284/P/Perp/92/2c~4925/P/00/1c~66069/P/00/1c
No Inv.: 93/P/Perp/92/1c~10689/P/Perp/92/1c
No Inv.: 1044/S/Perp/91/1c~341/S/Perp/89/1c~188/S/Perp/91/1c
No Inv.: 553/AF/Perp/91/1c