Aristotle's The "Art" of Rhetoric (Cambridge, MA: Harvard University Press, 1926)
Anonymous' Rhetorica ad Herennium (De ratione dicendi)
Cicero's De oratore, books I, II, trans. E. W. Sutton and H. Rackham (London: Heinemann, 1942)
Eunapius' Lives of Philosophers and Sophists 488-499