Bürowörterbuch
Langenscheidt

Teacher's Resource Pack 3
Zekl, Claudia ua

Speaking Activities
Timesaver

Longman Commercial Communication
Stanton/Wood

The American Dream
Bruck, Peter

The Heinemann English Grammar

Lexikon der englischen Synonyme

Communication for Business Lehrerha
Abegg, Birgit

Pollution
James, Barbara

Effective Presentations TB
Comfort, Jeremy