Visocky O'Grady, Jennifer. <br/><br/>
A designer's research manual : succeed in design by knowing your clients and what they really need 

 - USA  Rockpart Pub.  2006 
 - 190 
 - Design field guides .
<br/><br/><label>ISBN: </label>9781592535576 
<br/><br/><label>Dewey Class. No.: </label>741.6  VIS;1  R