Παραπομπή σε μορφή APA (7η εκδ.)

Hewings, M. (1999). Advanced grammar in use: A self-study reference and practice book for advanced learners of English : with answers. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English : With Answers. Cambridge: Cambridge University Press, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English : With Answers. Cambridge University Press, 1999.