Chestnut, Bill, author
Addison-Wesley Longman, 1997
Buku Teks
Artikel Jurnal
edited by Berelson, Bernard
American Library Association, 1949
Buku Teks
Ryan, Cornelius, author
Simon & Schuster, 1966
Buku Teks
Nugroho Notosusanto, author
Department of Defence and Security, 1970
Buku Teks