Porter, Lyman W. <br/><br/>
Motivation and work behavior / 

 - 7th ed. 
 - Boston   McGraw-Hill/Irwin,  2003. 
 - viii, 635 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/><label>ISBN: </label>0072481625  0071131027 
<br/><br/><label>LC Class. No.: </label>HF5549.51.M63  / .M85 2003