PET Masterclass Intermediate WB - Capel Annette,Nixon Rosemary
Objective PET Students Book - Hasemi, Thomas
Laser B1 Workbook with key + audio CD - Desypri M., Stournara J.
Laser B1 Students Book with CD-ROM - Mann Malcolm
Destination B1 - Grammar and Vocabulary with answer key - Mann M., Taylore-Knowles S.
Cambridge Grammar for PET SB with answers + audio CD - Hashem Louse, Thomas Barbara
Cambridge English Vocabulary for PET with answers + audio CD - Ireland Sue, Kosta Joanna