1940 Census Enumeration District Descriptions - Pennsylvania - Philadelphia County - ED 51-1242, ED 51-1243

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 51-1242, ED 51-1243. 1850-01-01/1950-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5859212. (Accessed November 19, 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 51-1242, ED 51-1243. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5859212
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/5859212>.
Note: These citations are programmatically generated and may be incomplete.