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20. Aristotle (1991 b). Poetics, Translated by I. Bywater: The Complete Works of Aristotle, Edited by Jonathan Barnes, Vol.2, Princeton: Princeton University Press, Fourth Printing.
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22. Aristotle (1991 d). Topics, Translated by W. A. Pickard-Cambridge, in: The Complete Works of Aristotle, Edited by Jonathan Barnes, Vol.1, Princeton: Princeton University Press, Fourth Printing.
23. Barnes, Ganathan (1995). The Cambridge Companion to Aristotle, Cambridge: Cambridge University Press.