APA aipamena

Singer, K. (1946). Duel for the northland: The war of enemy agents in Scandinavia. R. Hale Limited.

Chicago Style aipamena

Singer, Kurt. Duel for the Northland: The War of Enemy Agents in Scandinavia. London: R. Hale Limited, 1946.

MLA aipamena

Singer, Kurt. Duel for the Northland: The War of Enemy Agents in Scandinavia. R. Hale Limited, 1946.