Hutchinson, T., & Flamm, J. (1997). American hotline intermediate workbook. New York: Oxford University Press.
Trích dẫn kiểu ChicagoHutchinson, Tom, và Jacqueline Flamm. American Hotline Intermediate Workbook. New York: Oxford University Press, 1997.
Deismireacht MLAHutchinson, Tom, và Jacqueline Flamm. American Hotline Intermediate Workbook. New York: Oxford University Press, 1997.
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