Cita APA (7a ed.)

Oppenheim, A. N. Questionnaire design and attitude measurement. Heinemann Educational Books.

Cita Chicago Style (17a ed.)

Oppenheim, A. N. Questionnaire Design and Attitude Measurement. London: Heinemann Educational Books.

Cita MLA (9a ed.)

Oppenheim, A. N. Questionnaire Design and Attitude Measurement. Heinemann Educational Books.

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