Não informado. (1950). Library Science Abstracts. Library Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Library Science Abstracts. London: Library Association, 1950.
Lua MLA (8ú heag.)Não informado. Library Science Abstracts. Library Association, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.