Não informado. (1921). International Labour Review. International Labour Office.
Lua i Stíl Chicago (17ú heag.)Não informado. International Labour Review. Geneva, Suíça: International Labour Office, 1921.
Lua MLA (8ú heag.)Não informado. International Labour Review. International Labour Office, 1921.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.