Costa, P. T. M. (2009). Fighting forced labour: The example of Brazil. International Labour Office.
Chicago-referens (17:e uppl.)Costa, Patricía Trindade Maranhão. Fighting Forced Labour: The Example of Brazil. Geneva: International Labour Office, 2009.
MLA-referens (9:e uppl.)Costa, Patricía Trindade Maranhão. Fighting Forced Labour: The Example of Brazil. International Labour Office, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.