APA Citation

National Geographic Society. (1976). Our continent: A natural history of North America. Washington: National Geographic Society.

Chicago Style Citation

National Geographic Society. Our Continent: A Natural History of North America. Washington: National Geographic Society, 1976.

MLA Citation

National Geographic Society. Our Continent: A Natural History of North America. Washington: National Geographic Society, 1976.

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