APA (7th ed.) Citation

Butler, R. (2010). Stalin's secret war: The NKVD on the Eastern front (1. publ. in Great Britain.). Pen & Sword Military.

Chicago Style (17th ed.) Citation

Butler, Rupert. Stalin's Secret War: The NKVD on the Eastern Front. 1. publ. in Great Britain. Barnsley: Pen & Sword Military, 2010.

MLA (9th ed.) Citation

Butler, Rupert. Stalin's Secret War: The NKVD on the Eastern Front. 1. publ. in Great Britain. Pen & Sword Military, 2010.