Petri Herbert L. <br/><br/>
Motivatrion    Theory and research 
Petri Herbert L. 
 - California  Wordsworth         1981 
 - vii,380p.  cm. 
<br/><br/><label>ISBN: </label>0534009360 (hbk) 
<br/><br/><label>Standard No.: </label>14,699 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PSYCHOLOGY
<br/><br/><label>Dewey Class. No.: </label>S:65, M1