Business Objectives
Hollett, Vicki

Essential Grammar in Use
Murphy, Raymond

Photo Dictionary
Rosenthal/Freeman

Business Builder Modules 7, 8, 9
Emmerson, Paul

Focus on Modern Business 2 Extra Pr

Perspectives
Hopkins

Source Book for Teaching English
Lewis, Michael / Hill, Jimmie

English Grammar excersise
Hoffmann/schmidt

Lexikon der englischen Synonyme

Englisch Offenes Lernen
Zekl, Claudia