Cita APA

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.

Cita MLA

Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. 1949.

Atenció: Aquestes cites poden no estar 100% correctes.