(2021). Over 1 B COVID-19 vaccine doses administered globally. Philippine Star.
Dyfyniad Arddull Chicago"Over 1 B COVID-19 Vaccine Doses Administered Globally." Philippine Star 2021.
Dyfyniad MLA"Over 1 B COVID-19 Vaccine Doses Administered Globally." Philippine Star, 2021.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.