Beck, Robert C. , <br/><br/>
Motivation :  theories and principles / 
Robert C. Beck. 
 - 5th ed. 
 - x, 470 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>013111445X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology).
<br/><br/><label>LC Class. No.: </label>BF503   / .B38 2004