APA (7th ed.) Citation

World Book, Inc. (2018). The World Book encyclopedia. World Book, Inc., a Scott Fetzer company.

Chicago Style (17th ed.) Citation

World Book, Inc. The World Book Encyclopedia. Chicago: World Book, Inc., a Scott Fetzer company, 2018.

MLA (9th ed.) Citation

World Book, Inc. The World Book Encyclopedia. World Book, Inc., a Scott Fetzer company, 2018.

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