Macdougall, J. D. (2013). Frozen earth: The once and future story of ice ages. University of California Press.
芝加哥风格引文Macdougall, J. D. Frozen Earth: The Once and Future Story of Ice Ages. Berkeley: University of California Press, 2013.
MLA引文Macdougall, J. D. Frozen Earth: The Once and Future Story of Ice Ages. University of California Press, 2013.
警告：这些引文格式不一定是100％准确.