Beck, Robert Clarence,  1931- <br/><br/>
Motivation :  theories and principles / 
Robert C. Beck. 
 - 3rd ed. 
 - Englewood Cliffs, N.J. :  Prentice Hall,  1990. 
 - xii, 414 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliogr. references (p. 363-398) and indexes. 
<br/><br/><label>ISBN: </label>0136030777 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology)