TY  - BOOK
AU  - DeVellis,Robert F.
TI  - Scale development: theory and applications 
T2  - Applied social research methods series ; 26
SN  - 9781412980449
AV  - H61.27 .D48 2012
PY  - 2012///
CY  - Los Angeles
PB  - SAGE
KW  - Scaling
KW  - Social sciences
ER  -