No Inv.: 792-794/P/Perp/94/3c~1897-1899/P/Perp/98/3c~88705-88709/P/Perp/04/5c
No Inv.: 4343-4345/P/Perp/95/3c~3393-3413/P/Perp/99/20c
No Inv.: 706-707/P/Perp/92/2c
No Inv.: 2246-2250/P/Perp/95/5c~2320-2324/P/Perp/95/5c
No Inv.: 440/S/Perp/95/1c
No Inv.: 1688/S/Perp/91/1c
Judul asli :"The Essence of information systems"
No Inv.: 93/P/Perp/92/1c~10689/P/Perp/92/1c
No Inv.: 553/AF/Perp/91/1c
No Inv.: 11375-11384/P/Perp/92/10c