R.K. · R. T. · Roger T · Roger Turvey
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Lord Rhys, The - Prince of Deheubarth | 978-1-85902-430-0 (1-85902-430-0) | 1997 |
| The Welsh Princes, 1063-1283 | 978-0-582-30811-4 (0-582-30811-9) | 2002 |
| Twenty-One Welsh Princes | 978-1-84527-269-2 (1-84527-269-2) | 2010 |
Gwasg Carreg Gwalch · Gwasg Gomer · Longman