Coolican, Hugh
Research methods and statistics in psychology
Hodder & Stoughton, 2009
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Coolican, Hugh
Research methods and statistics in psychology
Psychology Press, 2014
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Weiss, Robert S.
Statistics in social research : an introduction
N.Y. Wiley , 1968
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Weiss, Robert S.
Statistics in social research an introduction
John Wiley & Sons, 1968
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Johnson, Janet Buttolph, 1950-
Political science research methods
CQ Press, 2012
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