APA (7th ed.) Zitazioa

BARNARD Geoffrey. (1959). Better spoken english. Macmillan.

Chicago Style (17th ed.) Zitazioa

BARNARD Geoffrey. Better Spoken English. London: Macmillan, 1959.

MLA (9th ed.) Zitazioa

BARNARD Geoffrey. Better Spoken English. Macmillan, 1959.