Frederiksen, O. J. Problems of Soviet Internal policy. Institut zur Erforschung der USSR.
Chicago Style (17th ed.) CitationFrederiksen, Oliver J. Problems of Soviet Internal Policy. Institut zur Erforschung der USSR.
Cita MLAFrederiksen, Oliver J. Problems of Soviet Internal Policy. Institut zur Erforschung der USSR.
Atenció: Aquestes cites poden no estar 100% correctes.