Charles, Curtis B.
John Wiley & Sons, 1996
Multimedia
Chapman, Nigel, author
John Wiley & Sons, 2009
Buku Teks
Andleigh, Prabhat K., author
Prentice-Hall, 1996
Buku Teks
Collins, Janet, author
Routledge, 1997
Buku Teks
Cawkell, Tony, author
Routledge, 1996
Buku Referensi