Gudjonsson, Gisli H.
Wiley, 2003
Buku Teks
John Wiley & Sons, 2003
Buku Teks SO
Best, Steven, author
Guildford Press, 1991
Buku Teks
by Gordon W. Allport ... [et al.]; edited by Gardner Lindzey
Addison-Wesley, 1956
Buku Teks
Kuther, Tara L., editor
Belmont, CA, 2006
Buku Teks