APA (7th ed.) Citation

Richards, J. C., Hull, J., & Proctor, S. (1998). New Interchange: English for international communication. Work Book 23. Cambridge University.

Chicago Style (17th ed.) Citation

Richards, Jack C., Jonathan Hull, and Susan Proctor. New Interchange: English for International Communication. Work Book 23. Cambridge: Cambridge University, 1998.

MLA (9th ed.) Citation

Richards, Jack C., et al. New Interchange: English for International Communication. Work Book 23. Cambridge University, 1998.