Living English Structure
Allen

Focus on Modern Business 2 Extra Pr

B for Business Instructor's Guide
Cullen, William ua

English Pronouns
Popko, Ulrich

Language Reference for Business Enh
Brieger/Comfort

Harrap's Easy English Dictionary
Pons

English Grammar in Use Supplementar
Hashemi, Lousie

Conserving Rainforests
Banks, Martin

Dictionary of New English 1963-1972
Barnhart

Advanced Exercises in Grammar 2
Thomson, A.J./ Martinet A.V.