Modern english business letters /

Eitemau Tebyg

• Language of english business letters /
  gan: Kench, A R .
• Basic business letters /
  gan: Gordon, D I .
  Cyhoeddwyd: (1977)
• Practical letter writing /
  gan: Gordon, Ian .
• Colloquial english: a complete english language course /
  gan: King, Gureth .
• Dictionary of modern english usage
  gan: Fowler, H.W
  Cyhoeddwyd: (1968)