APA (7th ed.) Citation

United States. Bureau of the Census. (1941). Sixteenth census of the United States: 1940: Population. First series. Number of inhabitants. United States summary. U. S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

United States. Bureau of the Census. Sixteenth Census of the United States: 1940: Population. First Series. Number of Inhabitants. United States Summary. Washington, D.C.: U. S. Govt. Print. Off., 1941.

MLA (8th ed.) Citation

United States. Bureau of the Census. Sixteenth Census of the United States: 1940: Population. First Series. Number of Inhabitants. United States Summary. U. S. Govt. Print. Off., 1941.