S. DONALD  TULL  I. DELHAWKINS <br/><br/>
MARKETING RESEARCH SIXTH EDITION 

 - NEW DELHI  PRENTICE-HALL OF INDIA  1993 
<br/><br/><label>ISBN: </label>81-203-0961-5 
<br/><br/><label>Dewey Class. No.: </label>658.83  / TUL/M