APA (7th ed.) Citation

World Book, Inc. (1997). The World Book encyclopedia. World Book International.

Chicago Style (17th ed.) Citation

World Book, Inc. The World Book Encyclopedia. London ; Sydney: World Book International, 1997.

MLA (8th ed.) Citation

World Book, Inc. The World Book Encyclopedia. World Book International, 1997.

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