Map of Blackford County, Indiana showing rural delivery service

Chicago citation style
United States. Post Office Department. Map of Blackford County, Indiana showing rural delivery service. 1911. Retrieved from the Digital Public Library of America, http://cdm16066.contentdm.oclc.org/cdm/ref/collection/p15078coll8/id/971. (Accessed July 22, 2018.)
APA citation style
United States. Post Office Department, (1911) Map of Blackford County, Indiana showing rural delivery service. Retrieved from the Digital Public Library of America, http://cdm16066.contentdm.oclc.org/cdm/ref/collection/p15078coll8/id/971
MLA citation style
United States. Post Office Department. Retrieved from the Digital Public Library of America <http://cdm16066.contentdm.oclc.org/cdm/ref/collection/p15078coll8/id/971>.
Note: These citations are programmatically generated and may be incomplete.