De Bono, Edward, <br/><br/>
Six thinking hats / 
De Bono, Edward, 
 - England :  Penguin Life, an imprint of Penguin Books,  2000 
 - xiii, 177 pages ; 
<br/><br/><label>ISBN: </label>9780241257531 (pbk.) 
<br/><br/><label>Dewey Class. No.: </label>153.42 D287S 2000