TY  - BOOK
AU  - Devellis, Robert F.
TI  - Scale Development : Theory and Applications 
SN  - 1506341569
AV  - H61.27 .D48 2017 c.1
PY  - 2017///
CY  - Los Angeles 
PB  - Sage
KW  - Scaling
KW  - Social sciences
ER  -