Hewings, M. (1999). Advanced grammar in use: A self-study reference and practice book for advanced learners of english, with answers. Cambridge University.
Citazione stile Chigago Style (17a edizione)Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English, with Answers. Cambridge: Cambridge University, 1999.
Citatione MLA (9a ed.)Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English, with Answers. Cambridge University, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.