Jones, L. (1986). Progress to proficiency: Student's book. Cambridge: Cambridge Univ. Press.
Trích dẫn kiểu ChicagoJones, Leo. Progress to Proficiency: Student's Book. Cambridge: Cambridge Univ. Press, 1986.
MLA CitationJones, Leo. Progress to Proficiency: Student's Book. Cambridge: Cambridge Univ. Press, 1986.
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