Spencer, S. (1994). Immigration as an economic asset: The German experience. IPPR.
Chicago-Zitierstil (17. Ausg.)Spencer, Sarah. Immigration as an Economic Asset: The German Experience. London: IPPR, 1994.
MLA-Zitierstil (9. Ausg.)Spencer, Sarah. Immigration as an Economic Asset: The German Experience. IPPR, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.