Proctor, Tony. <br/><br/>
Essentials of marketing research / 
Tony Proctor. 
 - 4th  ed. 
 - Harlow, England :  Prentice Hall,  2005. 
 - xxiii, 591  p. 
<br/><br/><label>ISBN: </label>0273694944 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marketing research.