Weisman, A. (2013). Countdown: Our Last, Best Hope for a future on earth? Little Brown.
芝加哥风格引文Weisman, Alan. Countdown: Our Last, Best Hope for a Future on Earth? London: Little Brown, 2013.
MLA引文Weisman, Alan. Countdown: Our Last, Best Hope for a Future on Earth? Little Brown, 2013.
警告：这些引文格式不一定是100％准确.