Firestone, Robert W.
American Psychological Association, 2003
Buku Teks
Thompson, Charles L.
Broooks/Cole, 1996
Buku Teks
edited by Matthew McKay and Kim Paleg
New Harbinger Publication , 1992
Buku Teks
The Free Press, 1982
Buku Teks
R. Yuniar
1990
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