Durrell, M. Hammers-s german grammar and usage. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Durrell, Martin. Hammers-s German Grammar and Usage. McGraw-Hill.
Lua MLA (8ú heag.)Durrell, Martin. Hammers-s German Grammar and Usage. McGraw-Hill.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.