Richards, J. C., Hill, J., & Proctor, S. (1990). Interchange: English for international communication 1. Cambridge: Cambridge University Press.
Chicago Style CitationRichards, Jack C., Jonathan Hill, and Susan Proctor. Interchange: English for International Communication 1. Cambridge: Cambridge University Press, 1990.
MLA CitationRichards, Jack C., Jonathan Hill, and Susan Proctor. Interchange: English for International Communication 1. Cambridge: Cambridge University Press, 1990.
Warning: These citations may not always be 100% accurate.