APA (7th ed.) Citation
(1993). <The> World Book Encyclopedia (1. ed.). World Book.
Chicago Style (17th ed.) Citation
<The> World Book Encyclopedia. 1. ed. Chicago: World Book, 1993.
MLA (9th ed.) Citation
<The> World Book Encyclopedia. 1. ed. World Book, 1993.
Warning: These citations may not always be 100% accurate.