National Geographic Society (U.S.). (1999). National Geographic United States atlas for young explorers. Washington, D.C: National Geographic Society.
Style de citation ChicagoNational Geographic Society (U.S.). National Geographic United States Atlas for Young Explorers. Washington, D.C: National Geographic Society, 1999.
Style de citation MLANational Geographic Society (U.S.). National Geographic United States Atlas for Young Explorers. Washington, D.C: National Geographic Society, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.