Schaefer, Susan Davidson. <br/><br/>
The motivation process / 
Susan Davidson Schaefer. 
 - Cambridge, Mass. :  Winthrop Publishers,  c1977. 
 - xvi, 189 p. ;  20 cm. 
<br/><br/><label>ISBN: </label>0876265832 :  $4.50 
<br/><br/><label>LCCN: </label>77076801  
<br/><br/><label>LC Class. No.: </label>HF5549.5.M63 S3  / S3 
<br/><br/><label>Dewey Class. No.: </label>658.31/4