Richards, J. C. (2009). Interchange: Third Edition. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Richards, Jack C. Interchange: Third Edition. Cambridge University Press, 2009.
Lua MLA (8ú heag.)Richards, Jack C. Interchange: Third Edition. Cambridge University Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.