Cambridge University Press , 1991
Buku Teks
Elster, Jon
Cambridge University Press, 1993
Buku Teks
Martha L. Cottam... [et.al.]
Lawrecce Erlbaum Associates, Publihers, 2004
Buku Teks
Ascher, William, author
Lawrence Erlbaum associates, 2005
Buku Teks
edited by John T. Jost and Jim Sidanius
Psychology Press, 2004
Buku Teks