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 CitationOMS. WHO Drug Information; Vol.7(N.4)/1993. Geneva: OMS, 1993.
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