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