Orgraff yr iaith Gymraeg /
Pwyllgor Iaith a Llên Bwrdd Gwybodau Celtaidd Prifysgol Cymru.
APA Citation
University of Wales. Board of Celtic Studies. Language and Literature Committee., Lewis, C. W. (Ceri Williams). (1987). Orgraff yr iaith Gymraeg. 3ydd argr. Caerdydd: Gwasg Prifysgol Cymru.
MLA Citation
University of Wales. Board of Celtic Studies. Language and Literature Committee, and Ceri W. (Ceri Williams) Lewis. Orgraff Yr Iaith Gymraeg. 3ydd argr. Caerdydd: Gwasg Prifysgol Cymru, 1987.
Warning: These citations may not always be complete (especially for serials).