Bono De, Edward, <br/><br/>
Six thinking hats / 
Edward de Bono. 
 - Boston :  Back Bay Books,  1999. 
 - xiii, 173 p. ; 
<br/><br/><label>ISBN: </label>0316178314 (pbk.) 0316177911 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Thought and thinking.
<br/><br/><label>Dewey Class. No.: </label>153.42 BON-S