De Bono, Edward,  1933- <br/><br/>
Six thinking hats / 
Edward de Bono. 
 - London ;  Penguin Books :  c1985. 
 - 207 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>9780141033051 
<br/><br/><label>LCCN: </label>89137944  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Creative thinking.<br/>Problem solving.
<br/><br/><label>LC Class. No.: </label>BF441  / .D385x 1986 
<br/><br/><label>Dewey Class. No.: </label>