Devellis, Robert F. <br/><br/>
Scale development: Theory and applications 

 - 4th ed. 
 - New Delhi  Sage  2017 
 - 262 p. 
<br/><br/><label>ISBN: </label>9781506341569 
<br/><br/><label>Dewey Class. No.: </label>300.72  DEV-S