Beck, Robert Clarence. <br/><br/>
Motivation :  theories and principles / 
Robert C. Beck. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  c1978. 
 - x, 470 p. :  ill. 
<br/><br/> Includes indexes. 
<br/><br/>Bibliography: p. 419-459. 
<br/><br/><label>ISBN: </label>0136039022  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology)