@book{Evans_Thomas_1983, address={Abertawe}, edition={11th ed}, title={Y geiriadur mawr: the complete Welsh-English English-Welsh dictionary}, publisher={Christopher Davies}, author={Evans, H. Meurig and Thomas, W. O.}, year={1983} }
@book{King_1993, address={London}, title={Modern Welsh: a comprehensive grammar}, volume={Routledge grammars}, publisher={Routledge}, author={King, Gareth}, year={1993} }
@book{Lewis_1996, address={Llandysul}, edition={Arg. newydd}, title={Y treigladur: a check-list of Welsh mutations}, publisher={Gomer}, author={Lewis, D. Geraint}, year={1996} }
@book{Meek_2005a, address={Caerdydd}, title={Cwrs mynediad: fersiwn y De = South Wales version}, publisher={CBAC}, author={Meek, Elin}, year={2005} }
@book{Meek_2005b, address={Caerdydd}, title={Cwrs mynediad: cwrs dechreuol i oedolion sy’n dysgu Cymraeg = a  beginners’ course for adults learning Welsh : pecyn ymarfer = practice pack, Fersiwn y De = South Wales version}, publisher={Uned Iaith Genedlaethol Cymru, CBAC}, author={Meek, Elin}, year={2005} }
@book{Stonelake_Davies_2005, address={Caerdydd}, title={Cwrs sylfaen : cwrs dechreuol i oedolion sy’n dysgu Cymraeg = a beginners’ course for adults learning Welsh : pecyn ymarfer = practice pack: Fersiwn y De = South Wales version}, publisher={Uned Iaith Genedlaethol Cymru}, author={Stonelake, Mark and Davies, Emyr}, year={2005} }
@book{Stonelake_Davies_2006, address={Caerdydd}, title={Cwrs sylfaen: fersiwn y De = South Wales version}, publisher={CBAC/WJEC}, author={Stonelake, Mark and Davies, Emyr}, year={2006} }
@book{Uned Iaith Genedlaethol Cymru_Welsh Joint Education Committee_1998, address={Llandysul}, edition={Arg. newydd, yn cynnwys mân newidiadau}, title={Gramadeg Cymraeg cyfoes: Contemporary Welsh grammar}, publisher={Gwasg Gomer}, author={Uned Iaith Genedlaethol Cymru and Welsh Joint Education Committee}, year={1998} }