OMS. (1993). Bulletin of WHO: Vol.71(6)/1993. Genève: OMS.
Trích dẫn kiểu ChicagoOMS. Bulletin of WHO: Vol.71(6)/1993. Genève: OMS, 1993.
MLA引文OMS. Bulletin of WHO: Vol.71(6)/1993. Genève: OMS, 1993.
警告：這些引文格式不一定是100％准確.
APA引文