Leech, G., & Svartvik, J. (1975). Communicative grammar of English. Longman.
Chicago Style aipamenaLeech, Geoffrey, and Jan Svartvik. Communicative Grammar of English. London: Longman, 1975.
MLA aipamenaLeech, Geoffrey, and Jan Svartvik. Communicative Grammar of English. Longman, 1975.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.