(2001). Common European framework of reference for languages: Learning, teaching, assessment. United Kingdom: Cambridge University Press.
Trích dẫn kiểu ChicagoCommon European Framework of Reference for Languages: Learning, Teaching, Assessment. United Kingdom: Cambridge University Press, 2001.
Trích dẫn MLACommon European Framework of Reference for Languages: Learning, Teaching, Assessment. United Kingdom: Cambridge University Press, 2001.
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