APA (7th ed.) Citation

Canby, T. Y. (1994). Our changing earth. National Geographic Society.

Chicago Style (17th ed.) Citation

Canby, Thomas Y. Our Changing Earth. Washington, D.C: National Geographic Society, 1994.

MLA (9th ed.) Citation

Canby, Thomas Y. Our Changing Earth. National Geographic Society, 1994.

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