OMS. (1993). WHO drug information; Vol.7(N.4)/1993. Geneva: OMS.
Trích dẫn kiểu ChicagoOMS. WHO Drug Information; Vol.7(N.4)/1993. Geneva: OMS, 1993.
MLA引文OMS. WHO Drug Information; Vol.7(N.4)/1993. Geneva: OMS, 1993.
警告：這些引文格式不一定是100％准確.
APA引文