Early Greek Philosophy, Volume IX: Sophists, Part 2 (Loeb Classical Library 532): 9

Early Greek Philosophy, Volume VIII: Sophists, Part 1 (Loeb Classical Library 531): 8

Early Greek Philosophy, Volume V: Western Thinkers, Part 2 (Loeb Classical Library 528)

Early Greek Philosophy, Volume III: Ionian Thinkers, Part 2 (Loeb Classical Library 526): 3

Early Greek Philosophy, Volume IV: Western Thinkers, Part 1 (Loeb Classical Library 527): 4