APA (7th ed.) Citation
World Book, Inc. (1992). The World Book Encyclopedia: N-O - Volume -14. World Book, Inc.
Chicago Style (17th ed.) Citation
World Book, Inc. The World Book Encyclopedia: N-O - Volume -14. Chicago: World Book, Inc, 1992.
MLA (9th ed.) Citation
World Book, Inc. The World Book Encyclopedia: N-O - Volume -14. World Book, Inc, 1992.
Warning: These citations may not always be 100% accurate.