Monsen, R. Joseph
The business world introduction to business readings
Houghton Mifflin, 1967
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Cooper, Donald R.
Business research methods
Irwin/McGraw-Hill, 1998
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Cooper, Donald R.
Business research methods
McGraw-Hill, 2001
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Cooper, Donald R.
Business research methods
McGraw-Hill, 2014
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Cooper, Donald R.
Business research methods
McGraw-Hill, 2006
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