APA (7th ed.) Citation

(1918). The Encyclopedia Americana: A library of universal knowledge. Encyclopedia Americana Corp..

Chicago Style (17th ed.) Citation

The Encyclopedia Americana: A Library of Universal Knowledge. New York: Encyclopedia Americana Corp., 1918.

MLA (8th ed.) Citation

The Encyclopedia Americana: A Library of Universal Knowledge. Encyclopedia Americana Corp., 1918.

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