1. Cyhoeddwyd

   The Illusion of Freedom

   ap Sion, P. E., 5 Maw 2015

   Allbwn ymchwil: Ffurf annhestunol › Cyfansoddiad

2. Cyhoeddwyd

   The Music of Michael Nyman.

   ap Sion, P. E. & Ap-Sion, P. E., 1 Ion 2007, Ashgate.

   Allbwn ymchwil: Llyfr/Adroddiad › Llyfr

3. Cyhoeddwyd

   The Order of Things. Analysis and Sketch Study in Two Works by Steve Reich

   Bakker, T. & ap Sion, P., Meh 2019, Yn: Zeitschrift der Gesellschaft für Musiktheorie. 16, 1, t. 99-122 23 t.

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

4. Cyhoeddwyd

   Three Studies for Piano.

   ap Sion, P. E. & Ap-Sion, P. E., 1 Ion 2004

   Allbwn ymchwil: Ffurf annhestunol › Cyfansoddiad

5. Cyhoeddwyd

   Timothy A. Johnson, John Adams's Nixon in China: Musical Analysis, Historical and Political Perspectives

   ap Sion, P. E. & Ap Sion, P., 1 Ion 2013, Yn: Journal of the Society for Musicology in Ireland. 8, t. 93-98

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

6. Cyhoeddwyd

   Towards a Typology of Code Mixing in Recent Welsh-language Popular Music.

   ap Sion, P. E. & Ap-Sion, P. E., 1 Ion 2006.

   Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

7. Cyhoeddwyd

   Towards a Typology of Code mixing in Recent Welsh-language Popular Music.

   ap Sion, P. E. & Ap-Sion, P. E., 29 Hyd 2007.

   Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

8. Cyhoeddwyd

   Towards an understanding of the perception of sounds, silences and repetition in American experimental and minimal music.

   ap Sion, P. E., Ap-Sion, P. E., Evans, T. & Barnett, R., 1 Ion 2006.

   Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

9. Cyhoeddwyd

   Tuag at Deipoleg o Gyfnewid Iaith mewn Enghreifftiau Diweddar o Ganu Pop Cymraeg.

   ap Sion, P. E. & Ap-Sion, P. E., 1 Ion 2007.

   Allbwn ymchwil: Cyfraniad at gynhadledd › Papur

10. Cyhoeddwyd

    Understanding Minimalist Film Music: The Case of Man on Wire

    ap Sion, P. E., 1 Meh 2012, Yn: Soundtrack. 5, 1, t. 51-66

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid