Hewings, M. (2005). Advanced grammar in use: A self-study reference and practice book for advanced learners of English ; with answers. Cambridge University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English ; with Answers. Cambridge, UK ; New York: Cambridge University Press, 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English ; with Answers. Cambridge University Press, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.