APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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