Citazione Stile APA (7a Edizione)

Leech, G. (2002). A Communicative grammar of english (3rd ed.). Pearson.

Citazione stile Chigago Style (17a edizione)

Leech, Geoffrey. A Communicative Grammar of English. 3rd ed. Delhi: Pearson, 2002.

Citatione MLA (9a ed.)

Leech, Geoffrey. A Communicative Grammar of English. 3rd ed. Pearson, 2002.