Gower R. Roger. (2011). Grammar in practice 4: 40 units of self-study grammar exercises with tests (5th ed.). Edinburgh, Cambridge University Press, 2011.
Style de citation Chicago (17e éd.)Gower R. Roger. Grammar in Practice 4: 40 Units of Self-study Grammar Exercises with Tests. 5th ed. Edinburgh, Cambridge University Press, 2011, 2011.
Style de citation MLA (9e éd.)Gower R. Roger. Grammar in Practice 4: 40 Units of Self-study Grammar Exercises with Tests. 5th ed. Edinburgh, Cambridge University Press, 2011, 2011.
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