Young, Kimball
Trench, Trubner, 1946
Buku Referensi
edited by Michael A. Hogg and Joel Cooper
Sage, 2003
Buku Teks
by Gordon W. Allport ... [et al.]; edited by Gardner Lindzey
Addison-Wesley, 1956
Buku Teks
edited by Garth J.O. Fletcher and Margaret S. Clark
Blackwell, 2003
Buku Teks
DeLamater, John D.
Colorado Westview Press, 2014
Buku Teks