Campbell, C., & Hanna Kryszewska. Learner-based teaching (6a ed.).
Lua i Stíl Chicago (17ú heag.)Campbell, Colin, agus Hanna Kryszewska. Learner-based Teaching. 6a ed.
Lua MLA (8ú heag.)Campbell, Colin, agus Hanna Kryszewska. Learner-based Teaching. 6a ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.