Factory machinery.

Chicago citation style
Factory machinery.. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/tf8199p3pr. (Accessed December 14, 2018.)
APA citation style
Factory machinery.. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/tf8199p3pr
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/tf8199p3pr>.
Note: These citations are programmatically generated and may be incomplete.