APA aipamena

Erickson, J. (1993). Craters, caverns, and canyons: Delving beneath the earth's surface. Facts on File.

Chicago Style aipamena

Erickson, Jon. Craters, Caverns, and Canyons: Delving Beneath the Earth's Surface. New York: Facts on File, 1993.

MLA aipamena

Erickson, Jon. Craters, Caverns, and Canyons: Delving Beneath the Earth's Surface. Facts on File, 1993.