Cooper, Donald R. <br/><br/>
Business Research Method 
/ by Donald R. Cooper 
 - 6th ed. 
 - New Delhi;  Tata McGraw-Hill Publishing:  1999. 
 - xvi, 703p. 
<br/><br/><label>ISBN: </label>0074635700 
<br/><br/><label>Dewey Class. No.: </label>658.0072  / COO/B