Agence France-Presse. (2022). Booster efficacy wanes by fourth month: US study. Philippine Star.
Cita Chicago (17th ed.)Agence France-Presse. "Booster Efficacy Wanes by Fourth Month: US Study." Philippine Star 2022.
Cita MLA (9th ed.)Agence France-Presse. "Booster Efficacy Wanes by Fourth Month: US Study." Philippine Star, 2022.
Atenció: Aquestes cites poden no estar 100% correctes.