Cita APA (7a ed.)

Oppenheim, A. N. (1966). Questionnaire design and attitude measurement. Heinemann.

Cita Chicago Style (17a ed.)

Oppenheim, A. N. Questionnaire Design and Attitude Measurement. London: Heinemann, 1966.

Cita MLA (8a ed.)

Oppenheim, A. N. Questionnaire Design and Attitude Measurement. Heinemann, 1966.