Bindra, Dalbir
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Buku Teks
Reeve, Johnmarshall, author
John Wiley & Sons, Inc., 2015
Buku Teks
Ani Oktarina, author
Fakultas Psikologi Universitas Indonesia, 2002
UI - Skripsi (Membership)
Schunk, Dale H., author
Prentice-Hall, 1996
Buku Teks
edited by Morehall R. Jones
University of Nebraska Press, 1962
Buku Teks