Coolican, Hugh
Psychology Press, 2014
Buku Teks
Coolican, Hugh
Hodder & Stoughton, 2009
Buku Teks
Weiss, Robert S.
N.Y. Wiley , 1968
Buku Teks
Weiss, Robert S.
John Wiley & Sons, 1968
Buku Teks SO
Johnson, Janet Buttolph, 1950-
CQ Press, 2012
Buku Teks SO