Gaya APA

Boer, J, Z, D. et al (2002). E-book Volcanoes in Human History: The Far-Reaching Effects of Major Eruptions . New Jersey: Princeton University Press.

Gaya MLA

Boer, Jelle, Zeilinga, De. et al. "E-book Volcanoes in Human History: The Far-Reaching Effects of Major Eruptions". New Jersey: Princeton University Press, 2002. Text.