International Encyclopaedia Of Psychology <br/><br/>
International encyclopaedia of psychology: v 2 : 

 - 1st 
 - London  Fitzroy Dearborn  1996 
 - ix,1886p p. 
<br/><br/><label>ISBN: </label>1-884964-60-5 
<br/><br/><label>Subjects--Index Terms: </label>Language Acquisition Theories - Work motivation