AHONEN, PERTTI. "The Responses and Policies of the Main Parties." After the Expulsion: West Germany and Eastern Europe 1945-1990. : Oxford University Press, 2003-11-06. Oxford Scholarship Online. 2010-01-01. Date Accessed 18 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199259892.001.0001/acprof-9780199259892-chapter-4>.
AHONEN, P.(2003-11-06). The Responses and Policies of the Main Parties. In After the Expulsion: West Germany and Eastern Europe 1945-1990. : Oxford University Press. Retrieved 18 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199259892.001.0001/acprof-9780199259892-chapter-4.
AHONEN, PERTTI. "The Responses and Policies of the Main Parties." In After the Expulsion: West Germany and Eastern Europe 1945-1990. : Oxford University Press, 2003-11-06. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199259892.001.0001/acprof-9780199259892-chapter-4.
AHONEN P. The Responses and Policies of the Main Parties. In: Ahonen P. After the Expulsion: West Germany and Eastern Europe 1945-1990. Oxford University Press; 2003. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199259892.001.0001/acprof-9780199259892-chapter-4. Accessed May 18, 2013.