Crampton, R. (1995). Eastern Europe in the twentieth century. Routledge.
Chicago Style (17th ed.) ZitazioaCrampton, R.J. Eastern Europe in the Twentieth Century. London: Routledge, 1995.
MLA (9th ed.) ZitazioaCrampton, R.J. Eastern Europe in the Twentieth Century. Routledge, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.