Gudjonsson, Gisli H.
Wiley, 2003
Buku Teks
John Wiley & Sons, 2003
Buku Teks
Best, Steven, author
Guildford Press, 1991
Buku Teks
edited by Ron Sun
Cambridge University Press, 2008
Buku Referensi
editor by Raymond F. Paloution
The guilford press, , 2005
Buku Teks