United States. Bureau of Employment Security. (1955). National employment services, United States. International Labour Office.
Citazione stile Chigago Style (17a edizione)United States. Bureau of Employment Security. National Employment Services, United States. Geneva: International Labour Office, 1955.
Citatione MLA (9a ed.)United States. Bureau of Employment Security. National Employment Services, United States. International Labour Office, 1955.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.