No Inv.: 75740/S/01/1c
No Inv.: 102434/PSM/Perp/05/1c
Bibliografi : hlm. 283 No Inv.: 135276/SM/Perp/13/1c
No Inv.: 13696-13698/P/Perp/94/3c
No Inv.: 79004/01/1c
Judul asli : "The Electronic Office"
No Inv.: 9061-9070/P/Perp/92/10c~1487-1489/P/Perp/92/3c~74516/01/1c~123390-123394/P/Perp/10/5c