De Vera, A. (2022). 2nd Covid booster shot for aged 50 and older, adults with comorbidities OK'd. Manila Bulletin.
Chicago Style (17. basım) AtıfDe Vera, Analou. "2nd Covid Booster Shot for Aged 50 and Older, Adults with Comorbidities OK'd." Manila Bulletin 2022.
MLA (9th ed.) AtıfDe Vera, Analou. "2nd Covid Booster Shot for Aged 50 and Older, Adults with Comorbidities OK'd." Manila Bulletin, 2022.
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