1. 2015
2. Enabling ministers and musicians to develop music in parish worship : : addressing the shortfall in ministerial support and training in the Church of England

   Thomas, S. (Awdur), Harper, J. (Goruchwylydd), Ion 2015

   Traethawd ymchwil myfyriwr: Meistr mewn Athroniaeth

3. In nomine Iesu omne genu flectatur: the late medieval mass and office of the holy name of Jesus; sources, development and practice

   Aveling, J. (Awdur), Harper, J. (Goruchwylydd), Ion 2015

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

4. New Voice : the patterns and provisions for girl choristers in the English cathedral choirs

   Mackey, A. (Awdur), Collins, C. (Goruchwylydd) & Harper, J. (Goruchwylydd), Ion 2015

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 2010
6. Aspects of Koinonia: Developing an ecclesiological approach to music in contemporary Christian worship

   Galbraith, D. (Awdur), Harper, J. (Goruchwylydd), Ion 2010

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth