APA

Leech G. S. J., . (2009). Communicative grammar of English. : English Language Book Society, London.

Chicago

Leech Geoffrey Svartvik Jan, . 2009. Communicative grammar of English. : English Language Book Society, London.

Harvard

Leech G. S. J., . (2009). Communicative grammar of English. : English Language Book Society, London.

MLA

Leech Geoffrey Svartvik Jan, . Communicative grammar of English. : English Language Book Society, London. 2009.