University of Cambridge. Local Examinations Syndicate. (2005). Cambridge IELTS 4: Examination papers from the University of Cambridge ESOL Examinations (With answers.). Cambridge University Press.
Цитирование в стиле Чикаго (17-е изд.)University of Cambridge. Local Examinations Syndicate. Cambridge IELTS 4: Examination Papers from the University of Cambridge ESOL Examinations. With answers. Cambridge: Cambridge University Press, 2005.
Цитирование MLA (8-е изд.)University of Cambridge. Local Examinations Syndicate. Cambridge IELTS 4: Examination Papers from the University of Cambridge ESOL Examinations. With answers. Cambridge University Press, 2005.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.