Harrap's Easy English Dictionary
Pons

Offenes Lernen
Zekl, Claudia

Education in Britain and America
Stenzel, Elke u.a.

English Vocabulary in Use
McCarthy, Michael u.a.

Travel
Rabley, Stephen

Focus on Modern Business 2 Resource

Business Targets
Greenall

Education
Issues 35

The Art of Teaching English
Morris

Telekolleg Englisch Band 3