No Inv.: 116581/SM/Perp/09/1c~140646/SM/Perp/14/1c
Bibliografi : hlm. 317-327No Inv.: 138871,138872/P/perp/14/2c
No. Inv. : 146051/S/Perp/15/1c
No Inv.: 804-805/BD/Perp/86/2c
No Inv.: 594-595/BD/Perp/86/2c
Judul asli: "Electronic Communication"
No Inv.: 1626-1630/P/Perp/95/5c~1674-1683/P/Perp/96/10c
No Inv.: 3770-3774/P/Perp/95/5c~1611-1615/P/Perp/95/5c