Tulfo, R. . T. (2021). Vaccine arrival delayed — why? Manila Times.
Chicagoスタイル(17版)引用形式Tulfo, Ramon T. "Vaccine Arrival Delayed — Why?" Manila Times 2021.
MLA(9版)引用形式Tulfo, Ramon T. "Vaccine Arrival Delayed — Why?" Manila Times, 2021.
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