1940 Census Enumeration District Descriptions - Pennsylvania - Philadelphia County - ED 51-2161, ED 51-2162, ED 51-2163

Chicago citation style
Department of Commerce. Bureau of the Census. Office of the Assistant Director for Operations. Geography Division. (3/13/1947 - 1968). 1940 Census Enumeration District Descriptions - Pennsylvania - Philadelphia County - ED 51-2161, ED 51-2162, ED 51-2163. 1850-01-01/1950-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5859587. (Accessed September 22, 2018.)
APA citation style
Department of Commerce. Bureau of the Census. Office of the Assistant Director for Operations. Geography Division. (3/13/1947 - 1968), (1850-01-01/1950-12-31) 1940 Census Enumeration District Descriptions - Pennsylvania - Philadelphia County - ED 51-2161, ED 51-2162, ED 51-2163. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5859587
MLA citation style
Department of Commerce. Bureau of the Census. Office of the Assistant Director for Operations. Geography Division. (3/13/1947 - 1968). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/5859587>.
Note: These citations are programmatically generated and may be incomplete.