Covey, Stephen R. <br/><br/>
Principl-centered leadership 

 - New York  Simon and Schusker  1991 
 - 334p. 
<br/><br/><label>ISBN: </label> RS 325.00 
<br/><br/><label>Source: </label> RS 325.00 
<br/><br/><label>Dewey Class. No.: </label>158.4 COV