Citazione Stile APA (7a Edizione)

National Geographic Society (U.S.). Special Publications Division & Melham, T. (1989). Great American journeys. The Society.

Citazione stile Chigago Style (17a edizione)

National Geographic Society (U.S.). Special Publications Division e Tom Melham. Great American Journeys. Washington, D.C: The Society, 1989.

Citatione MLA (9a ed.)

National Geographic Society (U.S.). Special Publications Division e Tom Melham. Great American Journeys. The Society, 1989.