Keuffel & Esser N4058-W Beginner's Simplex Slide Rule

Chicago citation style
Keuffel & Esser Co. Keuffel & Esser N4058-W Beginner's Simplex Slide Rule. 1954-1959. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214624&repo=DPLA. (Accessed November 14, 2018.)
APA citation style
Keuffel & Esser Co, (1954-1959) Keuffel & Esser N4058-W Beginner's Simplex Slide Rule. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214624&repo=DPLA
MLA citation style
Keuffel & Esser Co. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214624&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.