Erickson, J. (1993). Craters, caverns, and canyons: Delving beneath the earth's surface. Facts on File.
Čikaški stil citiranja (17. izdanje)Erickson, Jon. Craters, Caverns, and Canyons: Delving Beneath the Earth's Surface. New York: Facts on File, 1993.
MLA način citiranja (9. izdanje)Erickson, Jon. Craters, Caverns, and Canyons: Delving Beneath the Earth's Surface. Facts on File, 1993.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.