De Bono, Edward <br/><br/>
Six thinking hats 

 - London  Penguin  1990 
 - 207p, 22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Thinking Hats<br/>Thinking Hats,
<br/><br/><label>Dewey Class. No.: </label>BON  / 153.42