Não informado. (1976). Labour and society. International Institute for Labour Studies.
Chicago-referens (17:e uppl.)Não informado. Labour and Society. Geneva, Suíça: International Institute for Labour Studies, 1976.
MLA-referens (8:e uppl.)Não informado. Labour and Society. International Institute for Labour Studies, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.