Petri, Herbert L. <br/><br/>
Motivation :  theory and research / 
by Herbert L. Petri. 
 - Belmont, Ca. :  Wadsworth Publishing Co.,  1981. 
 - 380 pages :  illustration ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 321-361) and index. 
<br/><br/><label>ISBN: </label>0534009360 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology).