Baha'i Publishing · George Ronald
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Challenge of Baha'u'llah | 978-0-85398-360-6 (0-85398-360-7) | 1993 |
| The Challenge of Baha'u'llah | 978-1-931847-16-2 (1-931847-16-9) | 2005 |
G L. · G.M. · G. Matthews · Gary L. · Gary M. · Gary Matthews · L.M.