Gravetter, Frederick J.
Research methods for the behavioral sciences
CT Cengage Learning, 2016
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Gravetter, Frederick J.
Research methods for the behavioral sciences
Cengage, 2018
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Gravetter, Frederick J.
Research methods for the behavioral sciences
Wadsworth, 2012
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Cozby, Paul C.
Methods in behavioral research
McGraw-Hill, 2012
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Cozby, Paul C.
Methods in behavioral research
McGraw-Hill, 2012
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