APA (7th ed.) Citation

Ritchie, D., & Gates, A. E. (2001). Encyclopedia of earthquakes and volcanoes (New ed.). Facts on File.

Chicago Style (17th ed.) Citation

Ritchie, David, and Alexander E. Gates. Encyclopedia of Earthquakes and Volcanoes. New ed. New York: Facts on File, 2001.

MLA (9th ed.) Citation

Ritchie, David, and Alexander E. Gates. Encyclopedia of Earthquakes and Volcanoes. New ed. Facts on File, 2001.