APA (7th ed.) Citation

World Book, I. (1989). The World Book Encyclopedia of Science. World Book.

Chicago Style (17th ed.) Citation

World Book, Inc. The World Book Encyclopedia of Science. Chicago, IL: World Book, 1989.

MLA (9th ed.) Citation

World Book, Inc. The World Book Encyclopedia of Science. World Book, 1989.

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