(Sorted by rhetorician most relevant to the essay)
Aristotle
Augustine
Canonical Doubt, Critical Certainty: Counter-Conventions in Augustine and Kenneth Burke
Bacon, Sir Francis
Baudrillard, Jean
Burke, Kenneth
Canonical Doubt, Critical Certainty: Counter-Conventions in Augustine and Kenneth Burke
Cicero, Marcus Tullius
Corax & Tisias
Descartes, René
Foucault, Michel
Dangers, Possibilities: The Ethico-Political Choices in the Work of Michel Foucault
The Stratifications of Normativity
Gorgias
Grassi, Ernesto
Habermas, Jürgen
hooks, bell
Isocrates
Locke, John
Perelman, Chaïm
Plato
Protagoras
Quintilian
Richards, I.A.
Socrates
Toulmin, Stephen
Thomas of Aquinas
Weaver, Richard M.