| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Breve enciclopedia delle scienze religiose | 978-88-399-2058-4 (88-399-2058-7) | 2018 | Rüdiger Kaldewey |
| Was in Religion Sache ist: Lern- und Lebenswissen. In neuer Rechtschreibung | 978-3-491-75600-7 (3-491-75600-6) | 2004 | " |