APA引文

Engels, F. (1949). The Part played by labour in the transition from ape to man.

Chicago Edition Citation

Engels, 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.