APA引文

United States. World Agricultural Outlook Board, United States. Foreign Agricultural Service, & United States. Foreign Agricultural Service. Foreign Production Estimates Division. (1987). World crop production. U.S. Dept. of Agriculture, Foreign Agricultural Service.

Chicago Style (17th ed.) Citation

United States. World Agricultural Outlook Board, United States. Foreign Agricultural Service, and United States. Foreign Agricultural Service. Foreign Production Estimates Division. World Crop Production. [Washington, D.C.]: U.S. Dept. of Agriculture, Foreign Agricultural Service, 1987.

MLA引文

United States. World Agricultural Outlook Board, et al. World Crop Production. U.S. Dept. of Agriculture, Foreign Agricultural Service, 1987.