Corsini, Raymond J.
Brunner-Routledge, 2002
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Chaplin, J. P.
RajaGrafindo Persada, 2006
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edited by Philip Winn
Routledge, 2001
Buku Referensi
Indigo Books, 2005
Buku Referensi
edited by Gary R. VandenBos
American Psychologycal Association, 2007
Buku Referensi