Richards, J. C., Hull, J., & Proctor, S. (2005). Interchange: Student's book 1 (1a. ed.). Cambridge University.
Lua i Stíl Chicago (17ú heag.)Richards, Jack C., Jonathan Hull, agus Susan Proctor. Interchange: Student's Book 1. 1a. ed. Nueva York: Cambridge University, 2005.
Lua MLA (9ú heag.)Richards, Jack C., et al. Interchange: Student's Book 1. 1a. ed. Cambridge University, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.