National Geographic Society (U.S.). Special Publications Division. (1983). Preserving America's past. The Society.
Citación estilo ChicagoNational Geographic Society (U.S.). Special Publications Division. Preserving America's Past. Washington, D.C: The Society, 1983.
Cita MLANational Geographic Society (U.S.). Special Publications Division. Preserving America's Past. The Society, 1983.
Warning: These citations may not always be 100% accurate.