Darling, Brown & Sharpe Astronomical Linear Slide Rule

Chicago citation style
Brown & Sharpe Manufacturing Company. Darling, Brown & Sharpe Astronomical Linear Slide Rule. 1887. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1215066&repo=DPLA. (Accessed November 16, 2018.)
APA citation style
Brown & Sharpe Manufacturing Company, (1887) Darling, Brown & Sharpe Astronomical Linear Slide Rule. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1215066&repo=DPLA
MLA citation style
Brown & Sharpe Manufacturing Company. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1215066&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.