Cateora, Philip R.
2005
Multimedia
Majaro, Simon, author
George Allen & Uniwin, 1982
Buku Teks
Sheth, Jagdish N., author
Ohio South-Western Pub, 1989
Buku Teks
edited by H.B. Thorelli
Penguin Books, 1973
Buku Teks
Bradly, Frank
Prentice-Hall, 1995
Buku Teks