United States. Bureau of the Census. (1944). Sixteenth census of the United States: 1940: Population. Differential fertility 1940 and 1910. Standardized fertility rates and reproduction rates. A supplement to the report designated "Fertility for states and large cities". U.S. Govt. Print. Off..
Chicago Style (17th ed.) CitationUnited States. Bureau of the Census. Sixteenth Census of the United States: 1940: Population. Differential Fertility 1940 and 1910. Standardized Fertility Rates and Reproduction Rates. A Supplement to the Report Designated "Fertility for States and Large Cities". Washington, DC: U.S. Govt. Print. Off., 1944.
MLA (8th ed.) CitationUnited States. Bureau of the Census. Sixteenth Census of the United States: 1940: Population. Differential Fertility 1940 and 1910. Standardized Fertility Rates and Reproduction Rates. A Supplement to the Report Designated "Fertility for States and Large Cities". U.S. Govt. Print. Off., 1944.