De Bono, Edward <br/><br/>
PO  beyond yes & no 
Edward de Bono 
 - Rev ed. 
 - Harmondsworth  Penguin Books  1980 
 - 176p.  ill.  18cm. 
 - Pelican books .
<br/><br/><label>ISBN: </label>0140217150  RM13.39 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Problem solving--Psychological aspects