APA (7th ed.) Citation

Powell, J. L. (2001). Mysteries of terra firma: The age and evolution of the earth. Free Press.

Chicago Style (17th ed.) Citation

Powell, James Lawrence. Mysteries of Terra Firma: The Age and Evolution of the Earth. New York: Free Press, 2001.

MLA (9th ed.) Citation

Powell, James Lawrence. Mysteries of Terra Firma: The Age and Evolution of the Earth. Free Press, 2001.