Dietzgen 1767 National Simplex Slide Rule

Chicago citation style
Eugene Dietzgen Company. Dietzgen 1767 National Simplex Slide Rule. 1955-1959. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214515&repo=DPLA. (Accessed November 17, 2018.)
APA citation style
Eugene Dietzgen Company, (1955-1959) Dietzgen 1767 National Simplex Slide Rule. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214515&repo=DPLA
MLA citation style
Eugene Dietzgen Company. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214515&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.