Aristotle, Poetics
From RhetorClick
Brief Summary
A complete translation of the Poetics can be found here.
There are only 26 surviving chapters of the poetics, and they focus mainly on epics and tragedies (his work on comedy has sadly been lost). Aristotle distinguishes between rhetoric and poetry by claiming that "Socratic dialogues" cannot rightly be compared with poetry. The only real connection is that they both use language. He goes on to say, rather beautifully, that it's "not the [use of language] that makes the poet, but the verse that entitles them all to the name."
Applications of Theory
This page is going to briefly outline the Poetics. The book is divided into several "books" that will each be briefly summarized here.