APA (7th ed.) Citation
Leech, G., & Svartvik, J. (1980). <A> Communicative grammar of English. Longman.
Chicago Style (17th ed.) Citation
Leech, Geoffrey, and Jan Svartvik. <A> Communicative Grammar of English. London: Longman, 1980.
MLA (9th ed.) Citation
Leech, Geoffrey, and Jan Svartvik. <A> Communicative Grammar of English. Longman, 1980.
Warning: These citations may not always be 100% accurate.