Neuman, Lawrence W.
Basics of social research: qualitative and quantitative
Pearson New International edition, 2014
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Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2003
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Punch, Keith F.
Introduction to Social Research: quantitative and qualitative approaches
SAGE Publications, 1998
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Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 1994
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Grinnell, Richard M.
Social work research and evaluation : quantitative and qualitative approaches
F.E. Peacock Publishers, 2001
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