Colloquial english: a complete english language course /

Antzeko izenburuak

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