APA (7th ed.) Citation

Leech, G. N., & Svartvik, J. (1975). A communicative grammar of English. Longman.

Chicago Style (17th ed.) Citation

Leech, Geoffrey N., and Jan Svartvik. A Communicative Grammar of English. London: Longman, 1975.

MLA (9th ed.) Citation

Leech, Geoffrey N., and Jan Svartvik. A Communicative Grammar of English. Longman, 1975.

Warning: These citations may not always be 100% accurate.