- E-bookReasoning and Formal LogicRichard L. Epstein
- E-bookThe Pocket Guide to Critical ThinkingRichard L. Epstein
- E-bookThe Fundamentals of Argument AnalysisRichard L. Epstein
- E-bookCause and Effect, Conditionals, ExplanationsRichard L. Epstein
- E-bookAn Introduction to Formal LogicRichard L. Epstein
- E-bookReasoning in Science and MathematicsRichard L. Epstein
- E-bookHow to ReasonRichard L. Epstein
- E-bookPrescriptive ReasoningRichard L. Epstein
- E-bookHow to Reason + Reasoning in the SciencesRichard L. Epstein
- E-bookClassical Mathematical LogicRichard L. Epstein
- E-bookGuía Breve para el Pensamiento CríticoRichard L. Epstein
- E-bookAmerican GesturesAlex Raffi
- E-bookConventional GesturesRichard L. Epstein