Vernadsky, George
The origins of Russia
At The Clarendon Press, 1959
Buku Teks
Rogger, Hans
Russian in the age of modernisation and revolution 1881-1917
Longman, 1992
Buku Teks
Crummey, Robert O.
The Formation of Muscovy 1304 - 1613
Longman, 1993
Buku Teks
Fennell, John
Crisis of medieval Russia 1200-1304
Longman, 1983
Buku Teks
Goekov, B.
Kiev Rus
Foreign Languages Publishing House, 1959
Buku Teks