| title | ISBN-13 | year of publication |
|---|---|---|
| From Critical Theory of Society to Theology of Communicative Praxis | 978-0-88946-021-8 | 1998 |
| Hegel's Concept of Marriage and Family: The Origin of Subjective Freedom | 978-0-88946-022-5 | 1998 |
| Hegel's Philosophy of History: Theological, Humanistic and Scientific Evidence | 978-0-88946-023-2 | 1998 |
| Horkheimer's Critical Sociology of Religion: The Relative and the Transcendent | 978-0-88946-024-9 | 1987 |
J. S. · R.J. · R. S. · R. Siebert · Richard J. Siebert · Rudolf J. Siebert