How to teach writing
Harmer, Jeremy

Grammetiktraining Englisch
Seebauer/Rovina

Essential Grammar in Use
Murphy

Englische Wirtschaftssprache
Obenaus/Weidacher

English in Mind 1 Workbook 1
Puchta, Herbert ua

Business Builders 4, 5, 6
Emmerson, Paul

English for your trip abroad
Lion, Michael

Teacher's Resource Pack
Focus on modern Business 3

The Art of Teaching English
Morris

Life in Britain
Brookes/Fraenkel