(1928). Seasonal fluctuations in migration. Geneva: International Labour Office.
Lua i Stíl Chicago (17ú heag.)Seasonal Fluctuations in Migration. Geneva: International Labour Office, 1928.
Lua MLA (8ú heag.)Seasonal Fluctuations in Migration. Geneva: International Labour Office, 1928.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.