Anastasi, Anne, author
Prenhallindo, 1997
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Gregory, Robert J., author
Penerbit Erlangga, 2011
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Anastasi, Anne, author
Prenhallindo, 1998
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Gregory, Robert J., author
Erlangga, 2010
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Davido, Roseline D., author
Salemba Humanika, 2016
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