APA (7th ed.) Citation

Richards, J. C. (2005). Interchange: Intro workbook A (3a. ed.). Cambridge University.

Chicago Style (17th ed.) Citation

Richards, Jack C. Interchange: Intro Workbook A. 3a. ed. Nueva York: Cambridge University, 2005.

MLA (9th ed.) Citation

Richards, Jack C. Interchange: Intro Workbook A. 3a. ed. Cambridge University, 2005.