APA (7th ed.) Citation

(1992). The Planet Earth: The World Book Encyclopedia of Science. Published by World Book, Inc.

Chicago Style (17th ed.) Citation

The Planet Earth: The World Book Encyclopedia of Science. Chicago: Published by World Book, Inc, 1992.

MLA (9th ed.) Citation

The Planet Earth: The World Book Encyclopedia of Science. Published by World Book, Inc, 1992.

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