Gower R. Roger. (2008). Grammar in practice 6. Upper-intermediate: 40 units of self-study grammar exercises (3td. ed.). Edinburgh, Cambridge University Press, 2008.
Chicago Style (17th ed.) CitationGower R. Roger. Grammar in Practice 6. Upper-intermediate: 40 Units of Self-study Grammar Exercises. 3td. ed. Edinburgh, Cambridge University Press, 2008, 2008.
MLA (9th ed.) CitationGower R. Roger. Grammar in Practice 6. Upper-intermediate: 40 Units of Self-study Grammar Exercises. 3td. ed. Edinburgh, Cambridge University Press, 2008, 2008.
Warning: These citations may not always be 100% accurate.