Não informado. (1926). Yearbook of agriculture. U.S. Department of Agriculture.
Cita Chicago Style (17a ed.)Não informado. Yearbook of Agriculture. Washington: U.S. Department of Agriculture, 1926.
Cita MLA (8a ed.)Não informado. Yearbook of Agriculture. U.S. Department of Agriculture, 1926.
Precaución: Estas citas no son 100% exactas.