APA引文

United States. Dept. of Agriculture. Economic Research Service. (1991). World agriculture. U.S. Dept. of Agriculture, Economic Research Service.

Chicago Style (17th ed.) Citation

United States. Dept. of Agriculture. Economic Research Service. World Agriculture. Washington, D.C.: U.S. Dept. of Agriculture, Economic Research Service, 1991.

MLA引文

United States. Dept. of Agriculture. Economic Research Service. World Agriculture. U.S. Dept. of Agriculture, Economic Research Service, 1991.

警告：這些引文格式不一定是100％准確.