The heart of europe
Theo Publishing,
 Majalah, Jurnal, Buletin
McLoughlin, Clara
Exploring europe: Europe on the move / Clara McLoughlin; Faith Kilford
Office for Official, 1996
 Buku Teks
Kamen, Henry
Who's who in Europe 1450-1750
Routledge, 2000
 Buku Referensi
The Times guide to the peoples of Europe
edited by Felipe Fernandez-Armesto
Times Books, 1994
 Buku Referensi
Coon, Carleton S.
The races of Europe
Macmillan, 1948
 Buku Teks