APA (7th ed.) Citation

Roberts, I. W. (1991). Nicholas I and the Russian intervention in Hungary. St. Martin's Press.

Chicago Style (17th ed.) Citation

Roberts, Ian W. Nicholas I and the Russian Intervention in Hungary. New York: St. Martin's Press, 1991.

MLA (9th ed.) Citation

Roberts, Ian W. Nicholas I and the Russian Intervention in Hungary. St. Martin's Press, 1991.