Weisman, A. (2013). Countdown: Our Last, Best Hope for a future on earth? Little Brown.
Lua i Stíl Chicago (17ú heag.)Weisman, Alan. Countdown: Our Last, Best Hope for a Future on Earth? London: Little Brown, 2013.
Lua MLA (9ú heag.)Weisman, Alan. Countdown: Our Last, Best Hope for a Future on Earth? Little Brown, 2013.
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