Não informado. (1964). Soil and water. National Water and Soil Conservation Organization.
Chicagoスタイル(17版)引用形式Não informado. Soil and Water. Wellington: National Water and Soil Conservation Organization, 1964.
MLA(8版)引用形式Não informado. Soil and Water. National Water and Soil Conservation Organization, 1964.
警告: この引用は必ずしも正確ではありません.