(2021). Over 1 B COVID-19 vaccine doses administered globally. Philippine Star.
Chicago Style (17. basım) Atıf"Over 1 B COVID-19 Vaccine Doses Administered Globally." Philippine Star 2021.
MLA (9th ed.) Atıf"Over 1 B COVID-19 Vaccine Doses Administered Globally." Philippine Star, 2021.
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