| Titel | ISBN-13 (ISBN-10) | Erscheinungsjahr |
|---|---|---|
| A Philosophy of Ethics: The Birth of Morals at the Crossroads of Myth and History | 978-3-631-40537-6 (3-631-40537-5) | 1988 |
| The Search for Truth: A Textbook for Transcendental Philosophy | 978-3-631-40536-9 (3-631-40536-7) | 1988 |