Organizzazione mondiale della sanità. (1991). Global programme on AIDS: Progress report number 7 : may 1991. WHO.
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芝加哥风格引文
Organizzazione mondiale della sanità. Global Programme on AIDS: Progress Report Number 7 : May 1991. [Switzerland]: WHO, 1991.
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MLA引文
Organizzazione mondiale della sanità. Global Programme on AIDS: Progress Report Number 7 : May 1991. WHO, 1991.
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