Gaya APA
OPPENHEIM, A.N. (1966).
Questionnaire design and attitude measurement .
London:
Heinemann.
Gaya Chicago
OPPENHEIM, A.N.
Questionnaire design and attitude measurement.
London:
Heinemann,
1966.
Monograf.
Gaya MLA
OPPENHEIM, A.N.
Questionnaire design and attitude measurement.
London:
Heinemann,
1966.
Monograf.
Gaya Turabian
OPPENHEIM, A.N.
Questionnaire design and attitude measurement.
London:
Heinemann,
1966.
Monograf.