Krech, David
McGraw-Hill, 1962
Buku Teks
Allan B. I. Bernardo; Cecilia Gastardo- Conaco; Maria Emma Concepcion Liwag, editor
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Buku Teks
Gerungan, W.A.
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Buku Teks
DeLamater, John D.
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Buku Teks
edited by Michael Harris Bond
Sage, 1988
Buku Teks