APA-Zitierstil (7. Ausg.)
Engels, F. (2001). The Part played by labour in the transition from ape to man. Electric Book Co..
Chicago-Zitierstil (17. Ausg.)
Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. London: Electric Book Co., 2001.
MLA-Zitierstil (9. Ausg.)
Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. Electric Book Co., 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.