APA način citiranja (7. izdanje)

Gingrich, N., & Maple, T. (2007). A contract with the Earth. Johns Hopkins University Press.

Čikaški stil citiranja (17. izdanje)

Gingrich, Newt, i Terry Maple. A Contract with the Earth. Baltimore: Johns Hopkins University Press, 2007.

MLA način citiranja (9. izdanje)

Gingrich, Newt, i Terry Maple. A Contract with the Earth. Johns Hopkins University Press, 2007.