World Health Organization. (2020). Country & technical guidance: Coronavirus disease (COVID-19) [electronic resource]. WHO.
Chicagoスタイル(17版)引用形式World Health Organization. Country & Technical Guidance: Coronavirus Disease (COVID-19) [electronic Resource]. Geneva, Switzerland: WHO, 2020.
MLA(9版)引用形式World Health Organization. Country & Technical Guidance: Coronavirus Disease (COVID-19) [electronic Resource]. WHO, 2020.
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