ISO690 Edition Citation

1991. The World Book Encyclopedia: Volume 18, So-Sz. Chicago: World Book.

APA (7th ed.) Citation

(1991). The World Book Encyclopedia: Volume 18, So-Sz. World Book.

Chicago Style (17th ed.) Citation

The World Book Encyclopedia: Volume 18, So-Sz. Chicago: World Book, 1991.

MLA (9th ed.) Citation

The World Book Encyclopedia: Volume 18, So-Sz. World Book, 1991.

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