Gower, R. (2002). Grammar in practice 1: 40 units of self-study grammar exercises, with tests (1a. ed.). Cambridge University.
Цитирование в стиле Чикаго (17-е изд.)Gower, Roger. Grammar in Practice 1: 40 Units of Self-study Grammar Exercises, with Tests. 1a. ed. Cambridge: Cambridge University, 2002.
Цитирование MLA (9-е изд.)Gower, Roger. Grammar in Practice 1: 40 Units of Self-study Grammar Exercises, with Tests. 1a. ed. Cambridge University, 2002.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.