Devellis, Robert F. <br/><br/>
Scale development :  theory and applications / 
Robert F. DeVellis. 
 - 3rd ed. 
 - Thousand Oaks, Calif. :  SAGE Publication ,  2012. 
 - ix, 205 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>9781412980449  1412980445  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Scaling (Social sciences)
<br/><br/><label>Dewey Class. No.: </label>300.18  / DEV P12S