Artikel Jurnal
Hinca IP Panjaitan ... [and others]
Internews Indonesia, 2000
Buku Teks
Fakultas Teknik Universitas Indonesia, 2002
UI - Skripsi (Membership)
Arman Djohan Diponegoro, author
Universitas Indonesia, 1993
UI - Laporan Penelitian
American Radio Relay League, 1974
Buku Teks