Richards, J. C., Hull, J., & Proctor, S. (1998). New interchange: English for international communication : intro student's book 3b. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Richards, Jack C., Jonathan Hull, agus Susan Proctor. New Interchange: English for International Communication : Intro Student's Book 3b. Cambridge, UK ; New York: Cambridge University Press, 1998.
Lua MLA (8ú heag.)Richards, Jack C., et al. New Interchange: English for International Communication : Intro Student's Book 3b. Cambridge University Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.