Engels, F. (1949). The Part played by labour in the transition from ape to man.
シカゴスタイル引用形Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. Moscow, 1949.
MLA引用形式Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. 1949.
警告: この引用は必ずしも正確ではありません.