edited by Heinz Katschnig, Hugh Freeman and Norman Sartorius
John Wiley & Sons, 2006
Buku Teks
Drew, Clifford J.
A Bell & Howell Company, 1986
Buku Teks
Belk, Collen
Pearson - Benjamin Cummings, 2008
Buku Teks
Belk, Collen
Pearson Prentice Hall, 2007
Multimedia
Langness, L.L
Halt,Rinehart and Winston, 1965
Buku Teks