Soars, J., & Soars, L. (1987). Headway, Upper-Intermediate: Workbook. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoSoars, John, và Liz Soars. Headway, Upper-Intermediate: Workbook. Oxford: Oxford University Press, 1987.
MLA CitationSoars, John, và Liz Soars. Headway, Upper-Intermediate: Workbook. Oxford: Oxford University Press, 1987.
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