TY  - BOOK
AU  - DeVellis,Robert F.
TI  - Scale development: theory and applications 
T2  - Applied social research methods series
SN  - 9781506341569
PY  - 2017///], ©2017
CY  - Los Angeles
PB  - SAGE
KW  - Scaling (Social sciences)
N1  - Includes bibliographical references (pages 247-256) and index
ER  -