Leech, G. (2002). A Communicative grammar of english (3rd ed.). Pearson.
Chicago Style (17. basım) AtıfLeech, Geoffrey. A Communicative Grammar of English. 3rd ed. Delhi: Pearson, 2002.
MLA (9th ed.) AtıfLeech, Geoffrey. A Communicative Grammar of English. 3rd ed. Pearson, 2002.
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