Oppenheim, A. N. (2005). Questionnaire design, interviewing and attitude measurement (New ed.). Continuum.
Chicago Style aipamenaOppenheim, A. N. Questionnaire Design, Interviewing and Attitude Measurement. New ed. London: Continuum, 2005.
MLA aipamenaOppenheim, A. N. Questionnaire Design, Interviewing and Attitude Measurement. New ed. Continuum, 2005.
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