APA (7th ed.) Citation

Richards, J. C. Interchange. English for international communication. Intro Student's book (9a ed.).

Chicago Style (17th ed.) Citation

Richards, Jack C. Interchange. English for International Communication. Intro Student's Book. 9a ed.

MLA (8th ed.) Citation

Richards, Jack C. Interchange. English for International Communication. Intro Student's Book. 9a ed.

Warning: These citations may not always be 100% accurate.