National Geographic Society (U.S.). (1975). The new America's wonderlands: Our national parks (3rd ed.). National Geographic Society.
Cita Chicago Style (17a ed.)National Geographic Society (U.S.). The New America's Wonderlands: Our National Parks. 3rd ed. Washington, D.C.: National Geographic Society, 1975.
Cita MLA (8a ed.)National Geographic Society (U.S.). The New America's Wonderlands: Our National Parks. 3rd ed. National Geographic Society, 1975.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.