Y geiriadur newydd.
The new Welsh dictonary
[by] H. Meurig Evans [and] W. O. Thomas. Golygyddion ymgynghorol (consulting editors): Stephen J. Williams [and] Thomas Jones.
APA Citation
Evans, H. Meurig (Harold Meurig)., Thomas, W. O. (William Owen). (1956). Y geiriadur newydd: The new Welsh dictonary. [4th impression] Lladebie [Carmarthenshire]: Llyfrau'r Dryw (C. Davies, publisher).
MLA Citation
Evans, H. Meurig (Harold Meurig), and W. O. (William Owen) Thomas. Y Geiriadur Newydd: The New Welsh Dictonary. [4th impression] Lladebie [Carmarthenshire]: Llyfrau'r Dryw (C. Davies, publisher), 1956.
Warning: These citations may not always be complete (especially for serials).