| title | ISBN-13 (ISBN-10) | year of publication | |
|---|---|---|---|
| Edith Stein. Zeugnis des vernichteten Lebens | 978-3-451-18856-5 (3-451-18856-2) | 1983 | |
| Mary: A History of Doctrine and Devotion | 978-0-87061-252-7 (0-87061-252-2) | 2009 | |
| Mary: A History of Doctrine and Devotion | 978-0-7220-5221-1 (0-7220-5221-9) | 1985 |