Monthly Bulletin of Statistics.
Lua i Stíl Chicago (17ú heag.)Monthly Bulletin of Statistics. New York.
Lua MLA (8ú heag.)Monthly Bulletin of Statistics.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Monthly Bulletin of Statistics.
Lua i Stíl Chicago (17ú heag.)Monthly Bulletin of Statistics. New York.
Lua MLA (8ú heag.)Monthly Bulletin of Statistics.