Παραπομπή σε μορφή APA (7η εκδ.)

Hewings, M. (1993). Pronunciation tasks: A course for pre-intermediate learners. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hewings, Martin. Pronunciation Tasks: A Course for Pre-intermediate Learners. United Kingdom: Cambridge University Press, 1993.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hewings, Martin. Pronunciation Tasks: A Course for Pre-intermediate Learners. Cambridge University Press, 1993.