OMS. (1991). World health forum; Vol.12(N.4)/1991. Geneva: OMS.
Trích dẫn kiểu ChicagoOMS. World Health Forum; Vol.12(N.4)/1991. Geneva: OMS, 1991.
MLA引文OMS. World Health Forum; Vol.12(N.4)/1991. Geneva: OMS, 1991.
警告：這些引文格式不一定是100％准確.
APA引文