Alexander, L. (1976). First things first student's book: An integrated course for beginners. London: Longman.
Trích dẫn kiểu ChicagoAlexander, L.G. First Things First Student's Book: An Integrated Course for Beginners. London: Longman, 1976.
Deismireacht MLAAlexander, L.G. First Things First Student's Book: An Integrated Course for Beginners. London: Longman, 1976.
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