(1961). Seeds: The yearbook of griculture 1961. Washington: The United State Department of Agriculture.
Citação norma ChicagoSeeds: The Yearbook of Griculture 1961. Washington: The United State Department of Agriculture, 1961.
Citação norma MLASeeds: The Yearbook of Griculture 1961. Washington: The United State Department of Agriculture, 1961.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.