Cita APA (7th ed.)

Leech, G. N., & Svartvik, J. (1975). A communicative grammar of english (13a. ed.). Longman.

Cita Chicago (17th ed.)

Leech, Geoffrey N., i Jan Svartvik. A Communicative Grammar of English. 13a. ed. Londres: Longman, 1975.

Cita MLA (9th ed.)

Leech, Geoffrey N., i Jan Svartvik. A Communicative Grammar of English. 13a. ed. Longman, 1975.