Leonard, J. N. (1974). The first farmers. Time-Life International.
Chicagoスタイル(17版)引用形式Leonard, Jonathan Norton. The First Farmers. Nederland: Time-Life International, 1974.
MLA(9版)引用形式Leonard, Jonathan Norton. The First Farmers. Time-Life International, 1974.
警告: この引用は必ずしも正確ではありません.