Italian Marble Exhibit, Mining Building, World's Columbian Exposition. [Samples of different mined materials]

Chicago citation style
Not Known. Italian Marble Exhibit, Mining Building, World's Columbian Exposition. [Samples of different mined materials]. [Date not indicated]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt438nc0h7. (Accessed December 10, 2018.)
APA citation style
Not Known, ([Date not indicated]) Italian Marble Exhibit, Mining Building, World's Columbian Exposition. [Samples of different mined materials]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt438nc0h7
MLA citation style
Not Known. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt438nc0h7>.
Note: These citations are programmatically generated and may be incomplete.