Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Edwards, P., Roberts, I., Clarke, M., DiGuiseppi, C., Pratap, S., Wentz, R., & Kwan, I. (2002). Increasing response rates to postal questionnaires: Systematic review. BMJ.
Chicago Style (17th ed.) Zitazioa
Edwards, Phil, Ian Roberts, Mike Clarke, Carolyn DiGuiseppi, Sarah Pratap, Reinhard Wentz, eta Irene Kwan. "Increasing Response Rates to Postal Questionnaires: Systematic Review." BMJ 2002.
MLA (9th ed.) Zitazioa
Edwards, Phil, et al. "Increasing Response Rates to Postal Questionnaires: Systematic Review." BMJ, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.