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Lua i Stíl Chicago (17ú heag.)Sakwa, Richard. Putin and the Oligarch: The Khodorkovsky-Yukos Affair. New York, New York: I.B.Tauris & Co. Ltd, 2014.
Lua MLA (9ú heag.)Sakwa, Richard. Putin and the Oligarch: The Khodorkovsky-Yukos Affair. I.B.Tauris & Co. Ltd, 2014.
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