1940 Census Enumeration District Descriptions - Pennsylvania - Butler County - ED 10-1, ED 10-2, ED 10-3, ED 10-4, ED 10-5, ED 10-6, ED 10-7

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 - Butler County - ED 10-1, ED 10-2, ED 10-3, ED 10-4, ED 10-5, ED 10-6, ED 10-7. 1850-01-01/1950-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5857283. (Accessed June 25, 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 - Butler County - ED 10-1, ED 10-2, ED 10-3, ED 10-4, ED 10-5, ED 10-6, ED 10-7. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5857283
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/5857283>.
Note: These citations are programmatically generated and may be incomplete.