APA (7th ed.) Citation

Richards, J. C., Hull, J., & Proctor, S. (1994). Interchange: English for international communication. Cambridge University Press.

Chicago Style (17th ed.) Citation

Richards, Jack C., Jonathan Hull, and Susan Proctor. Interchange: English for International Communication. Cambridge University Press, 1994.

MLA (8th ed.) Citation

Richards, Jack C., et al. Interchange: English for International Communication. Cambridge University Press, 1994.