APA (7th ed.) Citation

Institute, A. (1975). The encyclopedia americana. Volume I. Americana Corporations.

Chicago Style (17th ed.) Citation

Institute, American. The Encyclopedia Americana. Volume I. Americana Corporations, 1975.

MLA (8th ed.) Citation

Institute, American. The Encyclopedia Americana. Volume I. Americana Corporations, 1975.

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