Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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