APA-ийн эшлэл(7 дахь хэвлэлт)

Macdougall, J. D. (2013). Frozen earth: The once and future story of ice ages. University of California Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Macdougall, J. D. Frozen Earth: The Once and Future Story of Ice Ages. Berkeley: University of California Press, 2013.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Macdougall, J. D. Frozen Earth: The Once and Future Story of Ice Ages. University of California Press, 2013.