Engels, F. (1949). The Part played by labour in the transition from ape to man.
Chicago Edition CitationEngels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. Moscow, 1949.
MLA引文Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. 1949.
警告:这些引文格式不一定是100%准确.