Não informado. (1976). Labour and society. International Institute for Labour Studies.
Lua i Stíl Chicago (17ú heag.)Não informado. Labour and Society. Geneva, Suíça: International Institute for Labour Studies, 1976.
Lua MLA (8ú heag.)Não informado. Labour and Society. International Institute for Labour Studies, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.