Charles Sumner and Henry Wadsworth Longfellow, ca. 1865

Chicago citation style
Gardner, Alexander. Charles Sumner and Henry Wadsworth Longfellow, ca. 1865. ca. 1865. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/portraits/id/238. (Accessed July 16, 2018.)
APA citation style
Gardner, Alexander, (ca. 1865) Charles Sumner and Henry Wadsworth Longfellow, ca. 1865. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/portraits/id/238
MLA citation style
Gardner, Alexander. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/portraits/id/238>.
Note: These citations are programmatically generated and may be incomplete.