United States. Bureau of Agricultural Economics. (1940). Rural cultural regions in the United States.
Chicago Style (17th ed.) CitationUnited States. Bureau of Agricultural Economics. Rural Cultural Regions in the United States. [Washington], 1940.
MLA (9th ed.) CitationUnited States. Bureau of Agricultural Economics. Rural Cultural Regions in the United States. 1940.
Warning: These citations may not always be 100% accurate.