Petri, Herbert L & Govern, John M  <br/><br/>
Motivation   : Theory, Research & Application / 
Herbert L Petri & John M Govern  
 - 6th ed  
 -  Cengage Learning   2013 
<br/><br/><label>ISBN: </label>9781111841096 
<br/><br/><label>Dewey Class. No.: </label>153.8  / PET