Hewings, M. (2005). Advanced grammar in use: A self-study reference and practice book for advanced learners of english, with answers (1a. ed.). Cambridge University.
Cita Chicago (17th ed.)Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English, with Answers. 1a. ed. Cambridge: Cambridge University, 2005.
Cita MLA (9th ed.)Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English, with Answers. 1a. ed. Cambridge University, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.