APA (7th ed.) Citation

De Vera, A. (2021). Pfizer COVID vax shelf life extended. Manila Bulletin.

Chicago Style (17th ed.) Citation

De Vera, Analou. "Pfizer COVID Vax Shelf Life Extended." Manila Bulletin 2021.

MLA (9th ed.) Citation

De Vera, Analou. "Pfizer COVID Vax Shelf Life Extended." Manila Bulletin, 2021.

Warning: These citations may not always be 100% accurate.