APA (7th ed.) Citation

Marshak, S., & Prothero, D. R. (2001). Earth: Portrait of a planet. W.W. Norton.

Chicago Style (17th ed.) Citation

Marshak, Stephen, and Donald R. Prothero. Earth: Portrait of a Planet. New York: W.W. Norton, 2001.

MLA (9th ed.) Citation

Marshak, Stephen, and Donald R. Prothero. Earth: Portrait of a Planet. W.W. Norton, 2001.