Cleve, F. M. (1973). The giants of pre-sophistic Greek philosophy: An attempt to reconstruct their thoughts : by Felix M. Cleve (3d ed.). M. Nijhoff.
Chicago-viite (17. p.)Cleve, Felix M. The Giants of Pre-sophistic Greek Philosophy: An Attempt to Reconstruct Their Thoughts : By Felix M. Cleve. 3d ed. The Hague: M. Nijhoff, 1973.
MLA-viite (8. p.)Cleve, Felix M. The Giants of Pre-sophistic Greek Philosophy: An Attempt to Reconstruct Their Thoughts : By Felix M. Cleve. 3d ed. M. Nijhoff, 1973.
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