Beck, Robert C.  1931- <br/><br/>
Motivation  theories and principles / 
Robert C. Beck. 
 - Englewood Cliffs, N. J. :  Prentice-Hall,  1978. 
 - x, 470 pages :  illustration ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 419-459) and index. 
<br/><br/><label>ISBN: </label>0136039022 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology).