APA (7th ed.) Citation

Gilbert, M. (2009). The Routledge atlas of American history (6th ed.). Routledge.

Chicago Style (17th ed.) Citation

Gilbert, Martin. The Routledge Atlas of American History. 6th ed. New York: Routledge, 2009.

MLA (9th ed.) Citation

Gilbert, Martin. The Routledge Atlas of American History. 6th ed. Routledge, 2009.