Castles, S. (2006). Back to the future? Can Europe meet its labour needs through temporary migration? International Migration Institute.
Chicago-referens (17:e uppl.)Castles, S. Back to the Future? Can Europe Meet Its Labour Needs Through Temporary Migration? International Migration Institute, 2006.
MLA-referens (9:e uppl.)Castles, S. Back to the Future? Can Europe Meet Its Labour Needs Through Temporary Migration? International Migration Institute, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.