APA aipamena

OMS. Bulletin of WHO: Vol.68(1)/1990. Geneva: OMS.

Chicago Style aipamena

OMS. Bulletin of WHO: Vol.68(1)/1990. Geneva: OMS.

MLA aipamena

OMS. Bulletin of WHO: Vol.68(1)/1990. Geneva: OMS.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.