TY  - BOOK
AU  - DeVellis Robert F. Au.
TI  - Scale development:  thoery and applications
T2  - Applied social research methods series
SN  - 9780506341569 (pbk)
U1  - YZ, Q7 
PY  - 2017///
CY  - Los Angeles
PB  -  Sage USA     
KW  - SOCIAL SCIENCES
ER  -