Huvudgrupp 1

• Brake, Julie; Jones, Christine, Welsh, Hodder, 2003
• King, Gareth, Basic Welsh: a grammar and workbook, London, Routledge, 1996
• King, Gareth, Intermediate Welsh: a grammar and workbook, London, Routledge, 1996
• King, Gareth, Modern Welsh: a comprehensive grammar, London ;a New York, Routledge, 1993
• The pocket modern Welsh dictionary: a guide to the living language, Oxford, Oxford University Press, 2000