| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Family, Commerce, and Religion in London and Cologne: Anglo-German Emigrants, c.1000–c.1300 | 978-0-521-63292-8 (0-521-63292-7) | 1998 |
| Family Commrc Relig London Cologne: Anglo-German Emigrants, c.1000-c.1300 | 978-0-521-52193-2 (0-521-52193-9) | 2008 |