APA (7th ed.) Citation

United States. National Agricultural Statistics Service & United States. Department of Agriculture. Economic Research Service. (1998). Agricultural chemical usage. NASS.

Chicago Style (17th ed.) Citation

United States. National Agricultural Statistics Service and United States. Department of Agriculture. Economic Research Service. Agricultural Chemical Usage. [Washington, D.C.]: NASS, 1998.

MLA (9th ed.) Citation

United States. National Agricultural Statistics Service and United States. Department of Agriculture. Economic Research Service. Agricultural Chemical Usage. NASS, 1998.