APA (7th ed.) Citation

Gingrich, N. (2007). A Contract With The Earth. The Johns Hopkins University Press.

Chicago Style (17th ed.) Citation

Gingrich, Newt. A Contract With The Earth. USA: The Johns Hopkins University Press, 2007.

MLA (9th ed.) Citation

Gingrich, Newt. A Contract With The Earth. The Johns Hopkins University Press, 2007.