Engels, F. (1949). The Part played by labour in the transition from ape to man.
Citación estilo ChicagoEngels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. Moscow, 1949.
Cita MLAEngels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. 1949.
Warning: These citations may not always be 100% accurate.