Duncan, J., & Parker, A. (2007). Open forum 3: Academic listening and speaking. Oxford: Oxford Univ. Press.
Trích dẫn kiểu ChicagoDuncan, Janie, và Amy Parker. Open Forum 3: Academic Listening and Speaking. Oxford: Oxford Univ. Press, 2007.
Deismireacht MLADuncan, Janie, và Amy Parker. Open Forum 3: Academic Listening and Speaking. Oxford: Oxford Univ. Press, 2007.
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