Portfolio of Eight Presidents

Chicago citation style
Nathaniel Currier, 27 Mar 1813 - 20 Nov 1888. Portfolio of Eight Presidents. 1840. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anpg_NPG.84.221.8&repo=DPLA. (Accessed December 15, 2018.)
APA citation style
Nathaniel Currier, 27 Mar 1813 - 20 Nov 1888, (1840) Portfolio of Eight Presidents. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anpg_NPG.84.221.8&repo=DPLA
MLA citation style
Nathaniel Currier, 27 Mar 1813 - 20 Nov 1888. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anpg_NPG.84.221.8&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.