| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| How to Understand the Virgin Mary | 978-0-334-02106-3 (0-334-02106-5) | 2011 |
| How to Understand the Virgin Mary | 978-0-8264-0946-1 (0-8264-0946-6) | 1996 |
| Per comprendere Maria di Nazaret | 978-88-263-1014-5 (88-263-1014-9) | 1993 |