Casinas, J. A. (2021). COVID-19 reproduction rate in NCR drops to 1.91. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Casinas, Jhon Aldrin. "COVID-19 Reproduction Rate in NCR Drops to 1.91." Manila Bulletin 2021.
Lua MLA (9ú heag.)Casinas, Jhon Aldrin. "COVID-19 Reproduction Rate in NCR Drops to 1.91." Manila Bulletin, 2021.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.