| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| What is Christian Democracy?: Politics, Religion and Ideology | Digital | 978-1-108-38975-4 (1-108-38975-9) | 2019 |
| What is Christian Democracy?: Politics, Religion and Ideology | Hardcover | 978-1-108-42166-9 (1-108-42166-0) | 2019 |