APA (7th ed.) Citation

(1960). The encyclopedia americana: The international reference work. Americana Corporation.

Chicago Style (17th ed.) Citation

The Encyclopedia Americana: The International Reference Work. New York [etc.]: Americana Corporation, 1960.

MLA (9th ed.) Citation

The Encyclopedia Americana: The International Reference Work. Americana Corporation, 1960.

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