Não informado. (1981). Soil and tillage research. Elsevier Scientific.
Chicagoスタイル(17版)引用形式Não informado. Soil and Tillage Research. Amsterdam: Elsevier Scientific, 1981.
MLA(8版)引用形式Não informado. Soil and Tillage Research. Elsevier Scientific, 1981.
警告: この引用は必ずしも正確ではありません.