Jazul, N. A. (2020). Two US firms offer COVID vaccines to PH: FDA cautions public against unregistered vaccines. Manila Bulletin.
Chicago Style aipamenaJazul, Noreen A. "Two US Firms Offer COVID Vaccines to PH: FDA Cautions Public Against Unregistered Vaccines." Manila Bulletin 2020.
MLA aipamenaJazul, Noreen A. "Two US Firms Offer COVID Vaccines to PH: FDA Cautions Public Against Unregistered Vaccines." Manila Bulletin, 2020.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.