United States. Department of Agriculture. Economic Research Service & Ahearn, M. (1998). Agricultural productivity in the United States. U.S. Dept. of Agriculture, Economic Research Service.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Economic Research Service and Mary Ahearn. Agricultural Productivity in the United States. Washington, DC (1301 New York Ave., NW, Washington 20005-4788): U.S. Dept. of Agriculture, Economic Research Service, 1998.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Economic Research Service and Mary Ahearn. Agricultural Productivity in the United States. U.S. Dept. of Agriculture, Economic Research Service, 1998.
Warning: These citations may not always be 100% accurate.