TY  - BOOK
AU  - Schuman,Howard
AU  - Presser,Stanley
TI  - Questions and answers in attitude surveys: experiments on question form wording, and context 
SN  - 0-7619-0359-3
AV  - H62 S288
PY  - 1996///
CY  - Thousand Oaks, Calif.
PB  - Sage
N1  - Incluye bibliografia
ER  -