Schonberger R J <br/><br/>
Operations management 
Schonberger R J; Knod E M 
 - 6 
 - London  London, Irwin  1997 
 - 723p 
<br/><br/><label>ISBN: </label>0-256-19406-8 
<br/><br/><label>Source: </label>Textbook