Wilkins, D. A. (1974). Second-language learning and teaching. Edward Arnold.
Chicago Style aipamenaWilkins, D. A. Second-language Learning and Teaching. London: Edward Arnold, 1974.
MLA aipamenaWilkins, D. A. Second-language Learning and Teaching. Edward Arnold, 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.