APA (7th ed.) Citation

Richards, J. C., Hull, J., & Proctor, S. (1990). Inter change: English for international communication: Student's book. Cambrige University Press.

Chicago Style (17th ed.) Citation

Richards, Jack C., Jonathan Hull, and Susan Proctor. Inter Change: English for International Communication: Student's Book. New York: Cambrige University Press, 1990.

MLA (8th ed.) Citation

Richards, Jack C., et al. Inter Change: English for International Communication: Student's Book. Cambrige University Press, 1990.