Richards, J. C., Hull, J., & Proctor, S. (1998). New interchange: English for international communication : intro student's book 3b. Cambridge University Press.

Richards, Jack C., Jonathan Hull, and Susan Proctor. New Interchange: English for International Communication : Intro Student's Book 3b. Cambridge, UK ; New York: Cambridge University Press, 1998.

Richards, Jack C., et al. New Interchange: English for International Communication : Intro Student's Book 3b. Cambridge University Press, 1998.