Παραπομπή APA

O'Connor, J. (1977). Better English Pronounciation. Cambridge University Press.

Παραπομπή Chicago Style

O'Connor, J.D. Better English Pronounciation. London: Cambridge University Press, 1977.

Παραπομπή MLA

O'Connor, J.D. Better English Pronounciation. Cambridge University Press, 1977.