Não informado. (1939). Bulletin of the Oxford University Institute of Statistics. Oxford University Institute of Statistics.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of the Oxford University Institute of Statistics. Oxford, Inglaterra: Oxford University Institute of Statistics, 1939.
Lua MLA (8ú heag.)Não informado. Bulletin of the Oxford University Institute of Statistics. Oxford University Institute of Statistics, 1939.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.