Gray, Richard, 1944-
A history of American poetry
John Wiley & Sons, 2015
Buku Teks
Vernadsky, George
The origins of Russia
At The Clarendon Press, 1959
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Rogger, Hans
Russian in the age of modernisation and revolution 1881-1917
Longman, 1992
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Crummey, Robert O.
The Formation of Muscovy 1304 - 1613
Longman, 1993
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Fennell, John
Crisis of medieval Russia 1200-1304
Longman, 1983
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