Não informado. (1950). Quarterly Labour Force Statistics. Organization for Economic Co-operation and Development.
Lua i Stíl Chicago (17ú heag.)Não informado. Quarterly Labour Force Statistics. Paris: Organization for Economic Co-operation and Development, 1950.
Lua MLA (8ú heag.)Não informado. Quarterly Labour Force Statistics. Organization for Economic Co-operation and Development, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.