Richards, J. C., Hull, J., & Proctor, S. (1997). New Interchange Vol. 1: English for international communication. Cambridge University Press.
Cita Chicago (17th ed.)Richards, Jack C., Jonathan Hull, i Sussan Proctor. New Interchange Vol. 1: English for International Communication. Cambridge: Cambridge University Press, 1997.
Cita MLA (9th ed.)Richards, Jack C., et al. New Interchange Vol. 1: English for International Communication. Cambridge University Press, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.