Oxenden, Clive. English file: advanced workbook with key Clive Oxenden, Christina Latham-Koenig. - 3rd edition - Oxford : Oxford University Press, 2018. - 87 p. : ill., (some col.) ; 23 cm. ISBN: 9780194502177 (pbk) Subjects--Topical Terms: English language LC Class. No.: PE1128.A2 / .O91E