Engineer, A. I. o. (1975). The encyclopedia americana. Volume XXI. American Corporation.
Chicago Style (17th ed.) CitationEngineer, American Institute of. The Encyclopedia Americana. Volume XXI. American Corporation, 1975.
MLA (8th ed.) CitationEngineer, American Institute of. The Encyclopedia Americana. Volume XXI. American Corporation, 1975.
Warning: These citations may not always be 100% accurate.