TY  - BOOK
AU  - DeVellis,Robert F.
TI  - Scale development : theory and applications / 
T2  - Applied social research methods series, 
SN  - 9781412980449
U1  - 300.72 
PY  - 2012///
CY  - London : 
PB  - Sage Publications , 
KW  - SCALING (SOCIAL SCIENCES)
N1  - Includes bibliographical references and index
ER  -