United States. Dept. of Agriculture. Economic Research Service, United States. Dept. of Agriculture. Economics and Statistics Service, & United States. World Food and Agricultural Outlook and Situation Board. (1981). Wheat outlook & situation. The Service.
Citação do estilo Chicago (17ª ed.)United States. Dept. of Agriculture. Economic Research Service, United States. Dept. of Agriculture. Economics and Statistics Service, e United States. World Food and Agricultural Outlook and Situation Board. Wheat Outlook & Situation. [Washington, D.C.]: The Service, 1981.
Citação MLA (8ª ed.)United States. Dept. of Agriculture. Economic Research Service, et al. Wheat Outlook & Situation. The Service, 1981.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.