APA (7th ed.) Citation

United States. Natural Resources Conservation Service & Mississippi Agricultural and Forestry Experiment Station. (1995). Soil survey of Simpson County, Mississippi. The Service.

Chicago Style (17th ed.) Citation

United States. Natural Resources Conservation Service and Mississippi Agricultural and Forestry Experiment Station. Soil Survey of Simpson County, Mississippi. [Washington, D.C.?]: The Service, 1995.

MLA (9th ed.) Citation

United States. Natural Resources Conservation Service and Mississippi Agricultural and Forestry Experiment Station. Soil Survey of Simpson County, Mississippi. The Service, 1995.