TY  - BOOK
AU  - DeVellis,Robert F.
TI  - Scale development: theory and applications
SN  - 9781506341569 (pbk. : alk. paper)
U1  - 300.72 
PY  - 2017///
CY  - Los Angeles
PB  - Sage
KW  - Scaling -Social sciences
ER  -