Engels, F. (2001). The Part played by labour in the transition from ape to man. Electric Book Co..
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Citação norma Chicago
Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. London: Electric Book Co., 2001.
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Citação norma MLA
Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. Electric Book Co., 2001.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.