De Bono, Edward. <br/><br/>
Six thinking hats  [Books]. 
Edward de Bono. 
 - London  Penguin Books.  1985 
 - 207 p. 
<br/><br/><label>ISBN: </label>0140227962  0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>Problem solving.<br/>Thought and thinking.
<br/><br/><label>Dewey Class. No.: </label>BF/455  / DEB