Map of the Southern States, showing the relative proportion of slaves in the different localities

Chicago citation style
Harper & Brothers. Map of the Southern States, showing the relative proportion of slaves in the different localities. 1863. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/9s161j37z. (Accessed July 18, 2018.)
APA citation style
Harper & Brothers, (1863) Map of the Southern States, showing the relative proportion of slaves in the different localities. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/9s161j37z
MLA citation style
Harper & Brothers. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/9s161j37z>.
Note: These citations are programmatically generated and may be incomplete.