Philippine News Agency & Mabasa, R. C. (2020). Russia ready to supply, invest on 'vaccine production' in PH. Manila Bulletin.
Cita Chicago (17th ed.)Philippine News Agency i Roy C. Mabasa. "Russia Ready to Supply, Invest on 'Vaccine Production' in PH." Manila Bulletin 2020.
Cita MLA (9th ed.)Philippine News Agency i Roy C. Mabasa. "Russia Ready to Supply, Invest on 'Vaccine Production' in PH." Manila Bulletin, 2020.
Atenció: Aquestes cites poden no estar 100% correctes.