APA-viite (7. p.)

Leech, G. (1973). A communicative grammar of English. Longman.

Chicago-viite (17. p.)

Leech, Geoffrey. A Communicative Grammar of English. London: Longman, 1973.

MLA-viite (9. p.)

Leech, Geoffrey. A Communicative Grammar of English. Longman, 1973.