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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBloomberg. "COVID Exit Strategy on Getting Vaccine to the World." Manila Bulletin 2020.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBloomberg. "COVID Exit Strategy on Getting Vaccine to the World." Manila Bulletin, 2020.
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