(1987). Our american land: 1987 yearbook of agriculture. Dept. of agriculture.
Stile di citazione ChicagoOur American Land: 1987 Yearbook of Agriculture. U S A: Dept. of agriculture, 1987.
Citazione MLAOur American Land: 1987 Yearbook of Agriculture. Dept. of agriculture, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.