Bibliografi : hlm. 416No Inv.: 146982/P/Perp/15/1c
No Inv.: 382-383/P/Perp/97/2c
No Inv.: 139168,139169/P/Perp/14/2c
Judul asli: "Electronic Communication"
No Inv.: 2944-2953/P/Perp/97/10c~2797/P/98/1c
Termasuk BibliografiNo Inv.: 138836, 138837/P/Perp/14/2c
No Inv.: 2656-2657/P/Perp/91/2c~875-877/P/Perp/93/3c~5910-5914/P/Perp/92/5c~3726-3735/P/Perp/97/10c
No Inv.: 1582-1584/BD/Perp/91/3c
Bibliografi : hlm. 207-211 No Inv.: 137455-137459/P/Perp/14/5c