Beck, Robert C. <br/><br/>
Motivation : theories and principles / 
Robert C. Beck. 
 - 5th ed. 
 -  Pearson/Prentice Hall  2004. 
<br/><br/>13314 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology).
<br/><br/><label>LC Class. No.: </label>BF503  / Bec.