Good, Carter V.
Methods of research educational, psychological, sociological
Appleton Century Crofts, 1954
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Lodico, Marguerite G.
Methods in educational research : from theory to practice
Jossey-Bass, 2010
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Gummesson, Evert
Qualitative methods in management research
Sage, 2000
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Vockell, Edward L.
Educational research
Macmillan, 1983
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Schmitt, Neal W.
Research methods in human resources management
South-Western Publishing, 1991
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