Tull Donald S <br/><br/>
Marketing research : Measurement and method text and cases 
Tull Donald S; Hawkyns Del L 
 - 3rd 
 - New York  New York, Macmillan Pub. co.  1984 
 - 794p 
<br/><br/><label>ISBN: </label>0-02-421780-8 
<br/><br/><label>Source: </label>Textbook