Swan, M., & Walter, C. (1997). How english works: A grammar practice book with answers. Oxford: Oxford Univ. Press.
Trích dẫn kiểu ChicagoSwan, Michael, và Catherine Walter. How English Works: A Grammar Practice Book With Answers. Oxford: Oxford Univ. Press, 1997.
MLA CitationSwan, Michael, và Catherine Walter. How English Works: A Grammar Practice Book With Answers. Oxford: Oxford Univ. Press, 1997.
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