APA-viite (7. p.)
Okey, R. (1991). Eastern Europe 1740-1985: Feudalism to communism (2nd ed.). Routledge.
Chicago-viite (17. p.)
Okey, Robin. Eastern Europe 1740-1985: Feudalism to Communism. 2nd ed. London: Routledge, 1991.
MLA-viite (9. p.)
Okey, Robin. Eastern Europe 1740-1985: Feudalism to Communism. 2nd ed. Routledge, 1991.
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