Certified proof

Chicago citation style
Certified proof. 1893-04-05. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1491257&repo=DPLA. (Accessed November 18, 2018.)
APA citation style
(1893-04-05) Certified proof. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1491257&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1491257&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.