Beri , G.C. <br/><br/>
Marketing research 

 - 4th ed. 
 - New Delhi  Tata McGraw-Hill  2008 
 - xviii p. + 579 
<br/><br/><label>ISBN: </label>0-07-062022-9 
<br/><br/><label>Dewey Class. No.: </label>381 B454M