Osborne, C. (2004). Presocratic Philosophy: A Very Short Introduction (1st.). Oxford.
Chicago-viite (17. p.)Osborne, Catherine. Presocratic Philosophy: A Very Short Introduction. 1st. Oxford, 2004.
MLA-viite (9. p.)Osborne, Catherine. Presocratic Philosophy: A Very Short Introduction. 1st. Oxford, 2004.
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