Não informado. (1940). Labor market and employment security. Bureau of Employment Security.
Cita Chicago Style (17a ed.)Não informado. Labor Market and Employment Security. Washington: Bureau of Employment Security, 1940.
Cita MLA (8a ed.)Não informado. Labor Market and Employment Security. Bureau of Employment Security, 1940.
Precaución: Estas citas no son 100% exactas.