Butler, W. M. (1989). Official proceedings of the International Commercial Congress: A conference of all nations for the Extension of Commercial Intercourse. Philadelphia: The Philadelphia Commercial Museum.
Chicago Style CitationButler, William Mill. Official Proceedings of the International Commercial Congress: A Conference of All Nations for the Extension of Commercial Intercourse. Philadelphia: The Philadelphia Commercial Museum, 1989.
MLA CitationButler, William Mill. Official Proceedings of the International Commercial Congress: A Conference of All Nations for the Extension of Commercial Intercourse. Philadelphia: The Philadelphia Commercial Museum, 1989.
Warning: These citations may not always be 100% accurate.