Não informado. (1940). Labor market and employment security. Bureau of Employment Security.
Style de citation Chicago (17e éd.)Não informado. Labor Market and Employment Security. Washington: Bureau of Employment Security, 1940.
Style de citation MLA (8e éd.)Não informado. Labor Market and Employment Security. Bureau of Employment Security, 1940.
Attention : ces citations peuvent ne pas être correctes à 100%.