Walsh, B. (2019). End times: A brief guide to the end of the world, asteroids, supervolcanoes, rogue robots, and more (First edition.). Hachette Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalsh, Bryan. End Times: A Brief Guide to the End of the World, Asteroids, Supervolcanoes, Rogue Robots, and More. First edition. New York: Hachette Books, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWalsh, Bryan. End Times: A Brief Guide to the End of the World, Asteroids, Supervolcanoes, Rogue Robots, and More. First edition. Hachette Books, 2019.
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