APA (7th ed.) Citation

United States. Bureau of Agricultural Economics & Heynen, W. J. (1971). Cartographic records of the Bureau of Agricultural Economics. National Archives.

Chicago Style (17th ed.) Citation

United States. Bureau of Agricultural Economics and William J. Heynen. Cartographic Records of the Bureau of Agricultural Economics. Washington: National Archives, 1971.

MLA (9th ed.) Citation

United States. Bureau of Agricultural Economics and William J. Heynen. Cartographic Records of the Bureau of Agricultural Economics. National Archives, 1971.