Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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