HEWINGS, M. (2000). Advanced Grammar in Use: A self-study reference and practice book for advanced learners of english with answers. Erlangga.
Lua i Stíl Chicago (17ú heag.)HEWINGS, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English with Answers. Erlangga, 2000.
Lua MLA (8ú heag.)HEWINGS, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English with Answers. Erlangga, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.