Fraser, David J., author
International Development Program of Australian and Colleges, 2006
Buku Referensi
Philp, Hugh
Macquarie University, 1984
Buku Teks
Haeussler, Ernest F., author
Reston Publishing, 1983
Buku Teks
Atkinson, Brian, author
Addison - Wesley , 1998
Buku Teks
Hornby, Win, author
Prentice-Hall, 2001
Buku Teks