Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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