Dellar, H., & Walkley, A. (2007). Work book innovations: A course in natural english. Thomson.
Chicagoスタイル(17版)引用形式Dellar, Hugh, , Andrew Walkley. Work Book Innovations: A Course in Natural English. United Kingdom: Thomson, 2007.
MLA(9版)引用形式Dellar, Hugh, , Andrew Walkley. Work Book Innovations: A Course in Natural English. Thomson, 2007.
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