Heifetz A., Roland <br/><br/>
Leadership without easy answers 

 - London :  The Belknap Press of Harvard Business School Press,  1994 
 - 348 pags; cartoné  inglés 
<br/><br/><label>ISBN: </label>0-674-51858-6 
<br/><br/><label>LCCN: </label>000002193