Barker, Chris
John Wiley & Sons, 2002
Buku Teks SO
Elliot Aronson...[et al.]
McGraw-Hill , 1990
Buku Teks SO
Shaughnessy, John J.
McGraw-Hill, 1997
Buku Teks SO
Giles, David C.
Routledge, 2002
Buku Teks SO
Zechmeister, Jeanne S.
McGraw-Hill, 2001
Buku Teks SO