Switch blocks

Chicago citation style
Sellers, Otto, 1868-1940. Switch blocks. 1914-10-10. Retrieved from the Digital Public Library of America, http://libx.bsu.edu/cdm/ref/collection/sellers/id/146. (Accessed June 20, 2018.)
APA citation style
Sellers, Otto, 1868-1940, (1914-10-10) Switch blocks. Retrieved from the Digital Public Library of America, http://libx.bsu.edu/cdm/ref/collection/sellers/id/146
MLA citation style
Sellers, Otto, 1868-1940. Retrieved from the Digital Public Library of America <http://libx.bsu.edu/cdm/ref/collection/sellers/id/146>.
Note: These citations are programmatically generated and may be incomplete.