Richards, J. C. (1991). Interchange: English for international communication : Teacher's manual. New York, US: Cambridge University Press.
Citación estilo ChicagoRichards, Jack C. Interchange: English for International Communication : Teacher's Manual. New York, US: Cambridge University Press, 1991.
Cita MLARichards, Jack C. Interchange: English for International Communication : Teacher's Manual. New York, US: Cambridge University Press, 1991.
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