Παραπομπή σε μορφή APA (7η εκδ.)

Hewings, M. (1999). Advanced English grammar: A self reference and practice book for advanced South Asian students. Foundation Books ; Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hewings, Martin. Advanced English Grammar: A Self Reference and Practice Book for Advanced South Asian Students. New Delhi : Cambridge: Foundation Books ; Cambridge University Press, 1999.

Παραπομπή σε μορφή MLA (8th εκδ.)

Hewings, Martin. Advanced English Grammar: A Self Reference and Practice Book for Advanced South Asian Students. Foundation Books ; Cambridge University Press, 1999.