freeze, g. (1997). Russia a history. Oxford.
Lua i Stíl Chicago (17ú heag.)freeze, gregory. Russia a History. New York: Oxford, 1997.
Lua MLA (9ú heag.)freeze, gregory. Russia a History. Oxford, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.