Perren, G. (1968). Teachers of English as a second language: Their training and preparation. Cambridge University Press.
Цитирование в стиле Чикаго (17-е изд.)Perren, G.E. Teachers of English as a Second Language: Their Training and Preparation. [London]: Cambridge University Press, 1968.
Цитирование MLA (9-е изд.)Perren, G.E. Teachers of English as a Second Language: Their Training and Preparation. Cambridge University Press, 1968.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.