Citazione Stile APA (7a Edizione)

National Geographic Society (U.S.). Book Division. (1997). Exploring America's historic places. The National Geographic Society.

Citazione stile Chigago Style (17a edizione)

National Geographic Society (U.S.). Book Division. Exploring America's Historic Places. Washington, D.C: The National Geographic Society, 1997.

Citatione MLA (9a ed.)

National Geographic Society (U.S.). Book Division. Exploring America's Historic Places. The National Geographic Society, 1997.