Proficiency Grammar

LONGMAN

Grammar and vocabulary for Cambridge advanced and proficiency. Per il Liceo scientifico [Lingua inglese]

Cambridge University Press

Common mistakes at proficiency... and how to avoid them. Per le Scuole superiori

English Language Academy

English Grammar Practice - Certificate in Proficiency of English : 100 C2 key word transformation sentences (English Edition)

English language academy

English Grammar Practice - Certificate in proficiency of English: 100 CPE Key word transformation sentences (English Edition)

Cambridge English

Objective Proficiency Student's Book Pack (Student's Book with Answers with Downloadable Software and Class Audio CDs (2)) 2nd Edition [Lingua inglese]

Cambridge Grammar for CAE and Proficiency: Book with answers and Audio-CD

Independently published

GRAMMAR FOR ADVANCED AND PROFICIENCY EXAMS      

Cambridge English

Grammar and Vocabulary for Advanced Book with Answers and Audio [Lingua inglese]: Self-Study Grammar Reference and Practice

Pelikan Yayınları

English Grammar: For ÜDS KPDS YDS TOEFL and Proficiency Exams

Independently published

C2 Proficiency Use of English: 10 Practice Tests, Extra Resources, Extra Practice with Answer Key II: Updated Exams (CPE)