edited by Hugh Mackay
The Open University, 1997
Buku Teks
Bennett, Jeffrey O.
Pearson - Addison Wesley, 2009
Multimedia
Cambridge University Press, 2004
Buku Teks
edited by Marcello Truzzi
Prentice-Hall, 1968
Buku Teks
Felson, Marcus
Pine force Press, 1998
Buku Teks