Boring for a blast in the depths of a coal mine. Pittsburgh, Pa

Chicago citation style
Not Known. Boring for a blast in the depths of a coal mine. Pittsburgh, Pa. [Date not indicated]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt429014s0. (Accessed December 13, 2018.)
APA citation style
Not Known, ([Date not indicated]) Boring for a blast in the depths of a coal mine. Pittsburgh, Pa. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt429014s0
MLA citation style
Not Known. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt429014s0>.
Note: These citations are programmatically generated and may be incomplete.