Kabiling, G. D. (2021). Ayala Corp. procuring 450,000 doses of AstraZeneca COVID vaccines. Manila Bulletin.
Cita Chicago (17th ed.)Kabiling, Genalyn D. "Ayala Corp. Procuring 450,000 Doses of AstraZeneca COVID Vaccines." Manila Bulletin 2021.
Cita MLA (9th ed.)Kabiling, Genalyn D. "Ayala Corp. Procuring 450,000 Doses of AstraZeneca COVID Vaccines." Manila Bulletin, 2021.
Atenció: Aquestes cites poden no estar 100% correctes.