Word for Word
Tribble

English Tenses
Schomaekers, Hiltrud

English Grammar in Use
Murphy, Raymond

Business Builders 4, 5, 6
Emmerson, Paul

International Business Role Plays
Kerridge, David

Longman Commercial Communication
Stanton/Wood

Travel
Rabley, Stephen

A Commercial Course
Eckersley/Kaufmann

Englisch Das brauchen SchülerInnen
Berzsenyi, Christa ua

English for Customer Care
Richey,Roesmary