Cita APA (7a ed.)
Oxenden, C. English file: Listen and speak (1a.ed.). Oxford University Press.
Cita Chicago Style (17a ed.)
Oxenden, Clive. English File: Listen and Speak. 1a.ed. Oxford University Press.
Cita MLA (9a ed.)
Oxenden, Clive. English File: Listen and Speak. 1a.ed. Oxford University Press.
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