APA-referens

United States Department of Agriculture. (1981). USDA Grade Standards: For Food and Farm Products. Washington, D.C: United States Department of Agriculture.

Chicago-stil citat

United States Department of Agriculture. USDA Grade Standards: For Food and Farm Products. Washington, D.C: United States Department of Agriculture, 1981.

MLA-referens

United States Department of Agriculture. USDA Grade Standards: For Food and Farm Products. Washington, D.C: United States Department of Agriculture, 1981.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.