| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Celtic Art in Pagan and Christian Times | 978-1-85891-075-8 (1-85891-075-7) | 1993 |
| The High Crosses of Ireland | 978-0-7661-9262-1 (0-7661-9262-8) | 2004 |
J A · J. Allen · J.R. · J.R. Allen · John Romilly Allen · R. A. · R. Allen