Sadongdong, M. A. (2021). No COVID-19 vaccine shortage, stockpile to last till Aug. 17 - Galvez. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Sadongdong, Martin A. "No COVID-19 Vaccine Shortage, Stockpile to Last Till Aug. 17 - Galvez." Manila Bulletin 2021.
Lua MLA (9ú heag.)Sadongdong, Martin A. "No COVID-19 Vaccine Shortage, Stockpile to Last Till Aug. 17 - Galvez." Manila Bulletin, 2021.
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