Covey, Stephen R. <br/><br/>
Principle-centered leadership 
Stephen R.Covey 
 - New York  Simon & Schuster  c1992 
 - 334p.;  21cm. 
<br/><br/><label>ISBN: </label>0671792806 
<br/><br/><label>Dewey Class. No.: </label>158.4  / COU