Παραπομπή APA

Burchfield, R. W. (1989). Unlocking the English language. Faber and Faber.

Παραπομπή Chicago Style

Burchfield, R. W. Unlocking the English Language. London ; Boston: Faber and Faber, 1989.

Παραπομπή MLA

Burchfield, R. W. Unlocking the English Language. Faber and Faber, 1989.