Gaya APA

Gates, A, E., Rithcie, D. (2007). Encyclopedia of Earthquakes and Volcanoes Third Edition (e-Book) (Third Edition). New York: Checkmark Books.

Gaya MLA

Gates, Alexander, E., Rithcie, David. "Encyclopedia of Earthquakes and Volcanoes Third Edition (e-Book)". Third Edition New York: Checkmark Books, 2007. Text.