Lua APA (7ú heag.)

Calayag, K. (2021). PH buys 40M doses of Pfizer vaccine. Manila Times.

Lua i Stíl Chicago (17ú heag.)

Calayag, Keith. "PH Buys 40M Doses of Pfizer Vaccine." Manila Times 2021.

Lua MLA (9ú heag.)

Calayag, Keith. "PH Buys 40M Doses of Pfizer Vaccine." Manila Times, 2021.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.