Bonnes, Mirilia, author
Sage, 1995
Buku Teks
Köhler, Wolfgang, 1887-1967, author
Liveright, 1947
Buku Teks
Riggio, Ronald E., author
Routledge, 2016
Buku Teks
Anderson, Barry F.
Wadsworth, 1966
Buku Teks
Santrock, John W.
McGraw-Hill, 2003
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