Swan, M. (1997). How English works: A grammar practice book with answers. Oxf: Oxf. Univ. Pr.
Trích dẫn kiểu ChicagoSwan, Michael. How English Works: A Grammar Practice Book With Answers. Oxf: Oxf. Univ. Pr, 1997.
MLA citiranjeSwan, Michael. How English Works: A Grammar Practice Book With Answers. Oxf: Oxf. Univ. Pr, 1997.
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