Zeller, Eduard, 1814-1908, author
Outlines of the history of Greek philosophy
Meridian Books, 1960
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Burnet, John
Early Greek philosophy. / John Burnet
Meridian Books, 1957.
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Philosophers speak for themselves: From Aristotle to Plotinus / editor Thomas Vernor Smith
University of Chicago Press, 1956
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Armstrong, A. H.
An introduction to ancient philosophy / by A.H. Armstrong
Newman Press, 1949
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Kirk, G.S. (Geoffrey Stephen), 1921-
The presocratic philosophers : a critical history with a selection of texts / by G.S. Kirk &​ J.E. Raven
Cambridge University Press, 1957
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