Richards, J. C., Hull, J., & Proctor, S. (1998). Changes: English for international communication : INTRO workbook. Cambridge: Cambridge University Press.
Chicago-стиль цитированияRichards, Jack C., Jonathan Hull, và Susan Proctor. Changes: English for International Communication : INTRO Workbook. Cambridge: Cambridge University Press, 1998.
MLA-цитированиеRichards, Jack C., Jonathan Hull, và Susan Proctor. Changes: English for International Communication : INTRO Workbook. Cambridge: Cambridge University Press, 1998.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.