APA (7th ed.) Citation

United States. Bureau of the Census. (1940). 1940 census. United Nations. Department of Public Information.

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. 1940 Census. Washington, D.C.: United Nations. Department of Public Information, 1940.

MLA (9th ed.) Citation

United States. Bureau of the Census. 1940 Census. United Nations. Department of Public Information, 1940.

Warning: These citations may not always be 100% accurate.