Não informado. (1940). Labor market and employment security. Bureau of Employment Security.
Lua i Stíl Chicago (17ú heag.)Não informado. Labor Market and Employment Security. Washington: Bureau of Employment Security, 1940.
Lua MLA (8ú heag.)Não informado. Labor Market and Employment Security. Bureau of Employment Security, 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.