Devellis, Robert F.  <br/><br/>
Scale development :   theory and applications/ 
Robert Devellis F. 
 - London :  Sage ,  1991.  
 - 120 p. : 
<br/><br/> includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied social research methods
<br/><br/><label>LC Class. No.: </label>H61.27 .D48 1991