APA (7th ed.) Citation

Williamson, D. G. (2009). Poland betrayed: The Nazi-Soviet invasions of 1939. Pen & Sword Military.

Chicago Style (17th ed.) Citation

Williamson, David G. Poland Betrayed: The Nazi-Soviet Invasions of 1939. Barnsley: Pen & Sword Military, 2009.

MLA (9th ed.) Citation

Williamson, David G. Poland Betrayed: The Nazi-Soviet Invasions of 1939. Pen & Sword Military, 2009.