APA aipamena

Spiegel, M. R. (2000). Questionnaire design and administration. John Wiley and Sons.

Chicago Style aipamena

Spiegel, Murray R. Questionnaire Design and Administration. John Wiley and Sons, 2000.

MLA aipamena

Spiegel, Murray R. Questionnaire Design and Administration. John Wiley and Sons, 2000.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.