Engel J F <br/><br/>
Promotional strategy  ; Managing the marketing communications process 
Engel J F 
 - 6 
 - Homewood  Homewood, Richard  D  IRWIN  1987 
 - 637p 
<br/><br/><label>ISBN: </label>0-256-03643-8 
<br/><br/><label>Source: </label>Textbook