Geducos, A. C. B. (2020). Duterte: PH to buy cheapest COVID-19 vaccine. Manila Bulletin.
芝加哥风格引文Geducos, Argyll Cyrus B. "Duterte: PH to Buy Cheapest COVID-19 Vaccine." Manila Bulletin 2020.
MLA引文Geducos, Argyll Cyrus B. "Duterte: PH to Buy Cheapest COVID-19 Vaccine." Manila Bulletin, 2020.
警告：这些引文格式不一定是100％准确.