Locke, Karen
Grounded theory in management research
Sage, 2001
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Halford, D.R.C.
Business planning a practical guide for management
Pan Books, 1971
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Zikmund, William G.
Business research methods
The Dryden Press , 1991
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Zikmund, William G.
Business research methods
The Dryden Press, 1988
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Zikmund, William G.
Business research methods
South-Western Cengage Learning, 2013
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