Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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