Civil War chessboard comprised of portraits of Unionist military leaders and political figures

Chicago citation style
Civil War chessboard comprised of portraits of Unionist military leaders and political figures. ca. 1863. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/portraits/id/333. (Accessed September 25, 2018.)
APA citation style
(ca. 1863) Civil War chessboard comprised of portraits of Unionist military leaders and political figures. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/portraits/id/333
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/portraits/id/333>.
Note: These citations are programmatically generated and may be incomplete.