Chan, A., & Ridley, M. (2021). Viral: The search for the origin of COVID-19 (First U.S. edition.). Harper, an imprint of HarperCollinsPublishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChan, Alina, और Matt Ridley. Viral: The Search for the Origin of COVID-19. First U.S. edition. New York, NY: Harper, an imprint of HarperCollinsPublishers, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रChan, Alina, और Matt Ridley. Viral: The Search for the Origin of COVID-19. First U.S. edition. Harper, an imprint of HarperCollinsPublishers, 2021.
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