Jespersen, O. How to Teach a Foreign Language.
Lua i Stíl Chicago (17ú heag.)Jespersen, Otto. How to Teach a Foreign Language.
Lua MLA (9ú heag.)Jespersen, Otto. How to Teach a Foreign Language.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.