APA (7th ed.) Citation

United States. Bureau of Agricultural Economics. (1940). Rural cultural regions in the United States.

Chicago Style (17th ed.) Citation

United States. Bureau of Agricultural Economics. Rural Cultural Regions in the United States. [Washington], 1940.

MLA (9th ed.) Citation

United States. Bureau of Agricultural Economics. Rural Cultural Regions in the United States. 1940.

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