Braun, E. (2021). Brink of extinction: Can we stop nature's decline? Compass Point Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBraun, Eric. Brink of Extinction: Can We Stop Nature's Decline? North Mankato, Minnesota: Compass Point Books, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBraun, Eric. Brink of Extinction: Can We Stop Nature's Decline? Compass Point Books, 2021.
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