Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

National Geographic Society (U.S.). (1959). National geographic. National Geographic Society.

Chicago Citation Edition Citation

National Geographic Society (U.S.). National Geographic. Washington, D.C.: National Geographic Society, 1959.

MLA Citation Edition Citation

National Geographic Society (U.S.). National Geographic. National Geographic Society, 1959.