De Bono, Edward, <br/><br/>
Six thinking hats / 
Edward de Bono. 
 - 1st Back Bay pbk. ed., rev. and updated. 
 - Boston :  Back Bay Books,  1999. 
 - xiii, 177 p. ;  21 cm. 
<br/><br/><label>ISBN: </label>0316178314 (pbk.) 0316177911 9780140296662 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Thought and thinking.
<br/><br/><label>Dewey Class. No.: </label>153  / BON N99S