The Psychology of Perception  English 
Vernon MD  
 -  Penguin Books  1962 
 - 252 
<br/><br/><label>ISBN: </label>0712116567 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public administration
<br/><br/><label>Dewey Class. No.: </label>354.41  / 19484