APA

United States Departament of Agriculture U., . (1931). United State Department of Agriculture : Leaflet. Washington: United States Departament of Agriculture.

Chicago

United States Departament of Agriculture Usda, . 1931. United State Department of Agriculture : Leaflet. Washington: United States Departament of Agriculture.

Harvard

United States Departament of Agriculture U., . (1931). United State Department of Agriculture : Leaflet. Washington: United States Departament of Agriculture.

MLA

United States Departament of Agriculture Usda, . United State Department of Agriculture : Leaflet. Washington: United States Departament of Agriculture. 1931.