Casinas, J. A. (2021). COVID-19 reproduction rate in NCR drops to 1.91. Manila Bulletin.
芝加哥风格引文Casinas, Jhon Aldrin. "COVID-19 Reproduction Rate in NCR Drops to 1.91." Manila Bulletin 2021.
MLA引文Casinas, Jhon Aldrin. "COVID-19 Reproduction Rate in NCR Drops to 1.91." Manila Bulletin, 2021.
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