APA (7th ed.) Zitazioa
Kelfve, S., & ET AL. (2014). Sampling and non-response bias on health-outcomes in surveys of the oldest old.
Chicago Style (17th ed.) Zitazioa
Kelfve, S., eta ET AL. Sampling and Non-response Bias on Health-outcomes in Surveys of the Oldest Old. 2014.
MLA (9th ed.) Zitazioa
Kelfve, S., eta ET AL. Sampling and Non-response Bias on Health-outcomes in Surveys of the Oldest Old. 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.