Nicholas Freudenberg, Susan Klitzman, Susan Saegert, editor
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Buku Teks
Hanson, Shirley May Harmon, author
F.A. Davis , 1996
Buku Teks
F. A. Davis , 1996
Buku Teks
Sarafino, Edward P., author
John Wiley & Sons, 1990
Buku Teks
American Psychological Association, {s.a}
Majalah, Jurnal, Buletin