APA Citation

Duckworth, M., & Gude, K. (1999). Countdown to first certificate: Workbook. Oxford: Oxford University Press.

Trích dẫn kiểu Chicago

Duckworth, Michael., và Kathy Gude. Countdown to First Certificate: Workbook. Oxford: Oxford University Press, 1999.

MLA Citation

Duckworth, Michael., và Kathy Gude. Countdown to First Certificate: Workbook. Oxford: Oxford University Press, 1999.

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