| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Experiential Religion | 978-0-06-066173-1 (0-06-066173-9) | 1972 |
| The Responsible Self: An Essay in Christian Moral Philosophy | 978-0-06-066210-3 (0-06-066210-7) | 1963 |
R.N. · R.R. · R. R. Niebuhr · Richard N. · Richard R