Bono, Edward de. <br/><br/>
Six thinking hats 

 - New Delhi  Penguin Books  1999 
 - vii,177p. 
<br/><br/><label>ISBN: </label> RS 923.08 (UKP 9.99) 
<br/><br/><label>Source: </label> RS 923.08 (UKP 9.99) 
<br/><br/><label>Dewey Class. No.: </label>153.42 BON