Business research methods / 
Donald R. Cooper/ Pamela S. Schindler. 
 - Eleventh edition. 
 - New York :  Mc Graw- Hill,  2011. 
 - 761 pages :  Illustrations ;  26 cm. 
<br/><br/><label>ISBN: </label>9780071325783 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Industrial management--research.