Tham khảo Người_Slav_Đông

  1. ↑ Oscar Halecki. (1952). Borderlands of Western Civilization. New York: Ronald Press Company. pp. 45-46
  2. ↑ John Channon & Robert Hudson, Penguin Historical Atlas of Russia (Penguin, 1995), p.16.
  3. ↑ Encyclopædia Britannica On-line
  4. ↑ Richard Pipes. (1995). Russia Under the Old Regime. New York: Penguin Books. pp. 27-28
  5. 1 2 Riasanovsky, Nicholas; Steinberg, Mark D. (2005). A History of Russia (ấn bản 7). New York: Oxford University Press. tr. 61, 87.
  6. ↑ Magocsi, Paul Robert (2010). A History of Ukraine: A Land and Its Peoples. Toronto: University of Toronto Press. tr. 73.

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