Heider, Karl G., author
University of Hawaii Press, 1991
Buku Teks
Beeby, C. E., author
Oxford University Press, 1979
Buku Teks
Beeby, C. E., author
New Zealand Council for Educational Research, 1979
Buku Teks
Oey-Gardiner, Mayling, author
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Artikel Jurnal
Banks, James A, author
Routledge, 2006
Buku Teks