APA ציטוט

OMS. (1991). Bulletin of WHO: Vol.69(6)/1991. Geneva: OMS.

Trích dẫn kiểu Chicago

OMS. Bulletin of WHO: Vol.69(6)/1991. Geneva: OMS, 1991.

ציטוט MLA

OMS. Bulletin of WHO: Vol.69(6)/1991. Geneva: OMS, 1991.