APA Style

Marshak, Stephen,, Prothero, Donald R.. (2001). Earth :portrait of a planet . New York :: Norton,.

Chicago Style

Marshak, Stephen,, Prothero, Donald R.. Earth :portrait of a planet. New York :: Norton,, 2001. Text.

MLA Style

Marshak, Stephen,, Prothero, Donald R.. Earth :portrait of a planet. New York :: Norton,, 2001. Text.

Turabian Style

Marshak, Stephen,, Prothero, Donald R.. Earth :portrait of a planet. New York :: Norton,, 2001. Print.