Não informado. (1940). Labor market and employment security. Bureau of Employment Security.
Chicagoスタイル(17版)引用形式Não informado. Labor Market and Employment Security. Washington: Bureau of Employment Security, 1940.
MLA(8版)引用形式Não informado. Labor Market and Employment Security. Bureau of Employment Security, 1940.
警告: この引用は必ずしも正確ではありません.