On course Key
Woxbrandt / Kunze

Living English Structure
Allan, W.Stannard

Dictionary odf Common Errors
Heaton/Turton

Lernhilfe Engisch 2
Wimmer, Reinhart

Effective Meetings
Comfort, Jeremy

Vocabulary in Use
McCarthy, Michael u.a.

English Grammar Style
Utz

Business,Opportunities Workbook
Hollett, Vicki

The Ratification of the Constitutin
Schrag

Die 2. Fundgrube für den Englischun
Clarke, David