Koontz H <br/><br/>
Essentials of management 
Koontz H; Weihrich H 
 - 5 
 - New York  New York, McGraw-Hill  1990 
 - 530p 
<br/><br/><label>ISBN: </label>0-07-100776-8 
<br/><br/><label>Source: </label>Textbook