Tull Donald S <br/><br/>
Marketing research :Measurment & method 
Tull Donald S; Hawkins Del I 
 - 6 
 - New Delhi  New Delhi, Prentice Hall  1993 
 - xviii,926 
<br/><br/><label>ISBN: </label>0-02-421932-0 
<br/><br/><label>Source: </label>Textbook