REFERENCES
- Awbery, G. M. 1985. Welsh mutations: syntax or phonology? Archivum linguisticum (New series), 6: 14–25.
- Ball, M. J. 1988. (Ed) The use of Welsh. Clevedon: Multilingual Matters.
- Ball, M. J. and N. Müller, (forthcoming). The mutations of Welsh: A linguistic investigation. London: Routledge.
- Davies, O. Wyn 1984a. “Y Blaned Iau-II.” Y Gwyddonydd, 22: 63–67.
- Davies, O. Wyn 1984b. “Y Tyllau Gwynion.” Y Gwyddonydd, 22: 40–43.
- Evans, A. 1984. “Hanes yr Haul a'r sêr-I.” Y Gwyddonydd, 22: 37–39.
- Evans, H. Meurig and W. O. Thomas, 1987. Y Geiriadur Mawr. 14th printing. Llandysul: Gomer.
- Fowkes, R. 1949. “Initial mutation of loanwords in Welsh.” Word, 5: 205–13.
- Geiriadur Prifysgol Cymru (1950-). [The University of Wales Dictionary.] Caerdydd: Gwasg Prifysgol Cymru.
- Morgan, T. J. 1952. Y Treigladau a'u Cystrawen. Caerdydd: Gwasg Prifysgol Cymru.
- Watkins, T. A. (forthcoming). “Welsh.” In Ball, M. J. and Jones, G. E. (eds), The Celtic Languages. London: Routledge.
- Williams, S. J. 1980. A Welsh grammar. Cardiff: University of Wales Press.