APA (7th ed.) Citation

Kusky, T. M., & Cullen, K. E. (2010). Encyclopedia of Earth and space science. Facts on File.

Chicago Style (17th ed.) Citation

Kusky, Timothy M., and Katherine E. Cullen. Encyclopedia of Earth and Space Science. New York: Facts on File, 2010.

MLA (9th ed.) Citation

Kusky, Timothy M., and Katherine E. Cullen. Encyclopedia of Earth and Space Science. Facts on File, 2010.