Richards, J. C., Hull, J., & Proctor, S. (1994). Changes: English for international communication : teacher's book 1. Cambridge: Cambridge University Press.
Chicago-стиль цитированияRichards, Jack C., Jonathan Hull, và Susan Proctor. Changes: English for International Communication : Teacher's Book 1. Cambridge: Cambridge University Press, 1994.
MLA-цитированиеRichards, Jack C., Jonathan Hull, và Susan Proctor. Changes: English for International Communication : Teacher's Book 1. Cambridge: Cambridge University Press, 1994.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.