A. W. ยท A. Williams
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Collins Writing for IELTS | 978-0-00-746761-7 (0-00-746761-3) | 2011 |
| Vocabulary: IELTS 5-6+ | 978-0-00-745682-6 (0-00-745682-4) | 2012 |
| Writing for IELTS (Collins English for Exams): IELTS 5-6+ | 978-0-00-742324-8 (0-00-742324-1) | 2011 |