Brieger, N., & Comfort, J. (2003). BEC Vantage Masterclass [CD-ROM]: Upper intermediate : workbook Audio CD. Oxford University Press.
Cita Chicago Style (17a ed.)Brieger, Nick, y Jeremy Comfort. BEC Vantage Masterclass [CD-ROM]: Upper Intermediate : Workbook Audio CD. Oxford: Oxford University Press, 2003.
Cita MLA (9a ed.)Brieger, Nick, y Jeremy Comfort. BEC Vantage Masterclass [CD-ROM]: Upper Intermediate : Workbook Audio CD. Oxford University Press, 2003.
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