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

Richards, Jack C., Jonathan Hull, and Susan Proctor. New Interchange: English for International Communication : Student's Book 3A. New edition. Cambridge, U.K. ; New York, NY, USA: Cambridge University Press, 1998.

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