United States. World's Columbian Commission. (1891). Classification of the World's Columbian exposition, Chicago, U.S.A., 1893. Donohue and Henneberry.
Chicago-referens (17:e uppl.)United States. World's Columbian Commission. Classification of the World's Columbian Exposition, Chicago, U.S.A., 1893. Chicago: Donohue and Henneberry, 1891.
MLA-referens (8:e uppl.)United States. World's Columbian Commission. Classification of the World's Columbian Exposition, Chicago, U.S.A., 1893. Donohue and Henneberry, 1891.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.