edited by Jacqueline A. Kalley, Elna Schoeman, Marlene Burger
University of South Africa, 2005
Buku Teks
Salas, Rafael M., author
Pergamon Press, 1979
Buku Teks
Sarkar, Amitava, author
[Springer, Springer], 2012
eBooks
Jakarta Dian Graha Electrika 1987,
Buku Teks
Harry Noor Sukarna, author
Kementerian Komunikasi dan Informasi Ri, 2015
Artikel Jurnal