Doyle, A. C. (1998). Langmaster course Intermediate level. Macmillan Heinemann.
Trích dẫn kiểu ChicagoDoyle, Arthur Conan. Langmaster Course Intermediate Level. Macmillan Heinemann, 1998.
Deismireacht MLADoyle, Arthur Conan. Langmaster Course Intermediate Level. Macmillan Heinemann, 1998.
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