Doff, A., & Jones, C. (2000). Language in use: Pre-intermediate (New edition.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Doff, Adrian, agus Christopher Jones. Language in Use: Pre-intermediate. New edition. Cambridge: Cambridge University Press, 2000.
Lua MLA (8ú heag.)Doff, Adrian, agus Christopher Jones. Language in Use: Pre-intermediate. New edition. Cambridge University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.