APA (7th ed.) Citation

National Geographic Society (U.S.). National geographic school bulletin. National Geographic Society.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

National Geographic Society (U.S.). National Geographic School Bulletin. National Geographic Society.

Warning: These citations may not always be 100% accurate.