HISTORY of the USSR. (1977). History of the Ussr. Progress pub..
Chicago Style (17th ed.) ZitazioaHISTORY of the USSR. History of the Ussr. Moscow: Progress pub., 1977.
MLA (9th ed.) ZitazioaHISTORY of the USSR. History of the Ussr. Progress pub., 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.