Gaya APA

Boer, J, Z, D., Sanders, D, T. (2002). Volcanoes in Humen History The Far Reaching Effects Of Major Eruption . usa: Princeton University Press.

Gaya MLA

Boer, Jelle, Zeilinga, De., Sanders, Donald, Theodore. "Volcanoes in Humen History The Far Reaching Effects Of Major Eruption". usa: Princeton University Press, 2002. Buku.