Παραπομπή σε μορφή APA (7η εκδ.)

Millington, J. W. (1989). O level English practice: Answer book (1st ed., 2nd impression.). Thomas Nelson.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Millington, John Ward. O Level English Practice: Answer Book. 1st ed., 2nd impression. Walton-on-Thames: Thomas Nelson, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Millington, John Ward. O Level English Practice: Answer Book. 1st ed., 2nd impression. Thomas Nelson, 1989.