Kouzes JM <br/><br/>
Leadership challenge 
Kouzes Jm; Posner Bz 
 - 4 
 - USA  USA, John wiley and sons  2007 
 - 377p 
<br/><br/><label>ISBN: </label>978-0-7879-8491-5 
<br/><br/><label>Source: </label>Textbook