Sadongdong, M. A. (2021). PH gets biggest shipment of Sputnik V from Russia. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSadongdong, Martin A. "PH Gets Biggest Shipment of Sputnik V from Russia." Manila Bulletin 2021.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSadongdong, Martin A. "PH Gets Biggest Shipment of Sputnik V from Russia." Manila Bulletin, 2021.
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