APA (7th ed.) Citation

Ward, P. D., & Brownlee, D. (2003). Rare earth: Why complex life is uncommon in the universe. Copernicus.

Chicago Style (17th ed.) Citation

Ward, Peter D., and Donald Brownlee. Rare Earth: Why Complex Life Is Uncommon in the Universe. New York: Copernicus, 2003.

MLA (9th ed.) Citation

Ward, Peter D., and Donald Brownlee. Rare Earth: Why Complex Life Is Uncommon in the Universe. Copernicus, 2003.