Aristotle’s Rhetoric
free online text at MIT Classics
Plato’s Gorgias
free online text at MIT Classics
Plato’s Gorgias by James H. Nichols
Includes excellent notes & essays
Plato’s Gorgias & Aristotle’s Rhetoric by Joe Sachs
Includes notes and essays on both texts
Plato’s Phaedrus:
free online text at MIT Classics. This dialogue discusses rhetoric from vantage point of beauty and awakening the soul.
Fallacies on the Internet Encyclopedia of Philosophy
An extensive list of logical (argumentative) fallacies. But not all are truly fallacious, they rather do not prove a point deductively. Be careful not to confuse demonstrative arguments with possibility.
Stanford Internet Encylcopedia Entry on Plato & Rhetoric
excellent resource on Plato, Rhetoric & the Gorgias
Same & Other 