| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Itinerant Kingship and Royal Monasteries in Early Medieval Germany, c.936-1075 | 978-0-521-52183-3 (0-521-52183-1) | 2002 |
| Itinerant Kingship and Royal Monasteries in Early Medieval Germany, c.936–1075 | 978-0-521-39489-5 (0-521-39489-9) | 1993 |