Shaughnessy, John J.
Research methods in psychology
McGraw-Hill, 1997
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Shaughnessy, John J.
Research methods in psychology
McGraw-Hill, 2003
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Elmes, David G
Research methods in psychology
Thomson/Wadsworth, 2006
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Shaughnessy, John J.
Research methods in psychology
McGraw-Hill, 2006
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Dunn, Dana S.
Research methods for social psychology
Wiley-Blackwell, 2009
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