Roam, Dan, <br/><br/>
Unfolding the napkin :   the hands-on method for solving complex problems with simple pictures / 
Dan Roam. 
 - New York :   Portfolio,  2009. 
 - xxxi, 286 p. :   ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Looking -- Seeing -- Imagining -- Showing -- Appendix : my visual answers to particularly challenging exercises -- Index. 
<br/><br/><label>ISBN: </label>9781591843191 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Problem solving --Audio-visual aids.<br/>Management --Audio-visual aids
<br/><br/><label>Dewey Class. No.: </label>658.403 ROA 2009