Ministry of Communication and Information Technology, 2008
Buku Referensi
Bibin Sibyanudin, author
Universitas Indonesia, 1997
UI - Skripsi (Membership)
Mangindaan, Belinda, author
Universitas Indonesia, 2006
UI - Tesis (Membership)
Panjaitan, Hulman, author
Indo Hill Co, 2007
Buku Teks
Universitas Indonesia, 2002
UI - Skripsi (Membership)