Lewis, Robyn. Blas ar Iaith Cwmderi ['a flavour of the language of Cwmderi']. Llanrwst (Gwynedd): Gwasg Carreg Gwalch, 1993. In Welsh. Written around the characters of the popular TV show Pobol y Cwm.
Thomas, Alan, Ed. Welsh Dialect Survey. Cardiff: University of Wales Press, 2000.
Thomas, Alan. The Linguistic Geography of Wales. 1973. Out of print.
Thomas, Beth, and Peter Wynn Thomas. Cymraeg, Cymrâg, Cymrêg. . .: Cyflwyno'r Tafodieithoedd ['Cymraeg, Cymrâg, Cymrêg. . .: presenting the dialects']. Cardiff: Gwasg Taf, 1989. In Welsh. Out of print.
Books Written in Dialect:
Hughes, T. Rowland. O Law I Law. Ed. Basil Davies. Llandysul (Dyfed): Gwasg Gomer, 1984. Gwynedd dialect.
Jones, Goronwy. Dyddiadur Dyn Dwad. Llanrwst: Gwasg Carreg Gwalch, 1998. Humor, in Caernarfonshire dialect.
Pontsiân, Eirwyn. Hyfryd Iawn!. Y Lolfa. In Cardiganshire/Carmarthenshire dialect.
