Colloquial english: a complete english language course /

Eitemau Tebyg

• Course in basic scientific english /
  gan: Ewer, J R .
• Language of english business letters /
  gan: Kench, A R .
• Modern english business letters /
  gan: King, F W .
• Mastering English language
  gan: Burton, S H; Humphries, J A
  Cyhoeddwyd: (1992)
• IELTS : International English Language Testing System
  gan: Sambit,K Das
  Cyhoeddwyd: (2005)