Richards, J. C., Hull, J., & Proctor, S. (2008). New interchange: English for international communication. Cambridge University Press, Cambridge University Press India Pvt. Ltd..
Lua i Stíl Chicago (17ú heag.)Richards, Jack C., Jonathan Hull, agus Susan Proctor. New Interchange: English for International Communication. Cambridge ; New Delhi: Cambridge University Press, Cambridge University Press India Pvt. Ltd., 2008.
Lua MLA (8ú heag.)Richards, Jack C., et al. New Interchange: English for International Communication. Cambridge University Press, Cambridge University Press India Pvt. Ltd., 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.