John Baer, James C. Kaufman, Roy F. Baumeister, editor
Oxford University Press, 2008
Buku Teks
Hasselbeck, Elisabeth, author
Center Street, 2009
Buku Teks
Cohn, P.M., author
Academic Press, 1985
Buku Teks
Oxley, Alan, author
Harvester Wheatsheaf, 1990
Buku Teks
Haworth, Alan
Routledge, 1998
Buku Teks