Departemen Informasi Republik Indonesia, 1987
Buku Referensi
Cook, Chris
Longman, 1991
Buku Referensi
Queensland University of Technology, 1998
Buku Referensi
edited bTheo Van Leeuwen, Carey Jewitt
Sage Publications, 2001
Buku Referensi
Bolander, Donald O.
Career Publishing, 1992
Buku Referensi