Spielberger, Charles D. Ed. <br/><br/>
Encyclopaedia of applied psychology. 

 - Amsterdam :  Elsevier,         2004. 
 - xxxviii,844p. 
 -  Volume 3: Per-Y, index .
<br/><br/><label>ISBN: </label>0126574103 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology-Encyclopaedia
<br/><br/><label>Dewey Class. No.: </label>Sk  P4.3