Sanford, G. (1999). Poland: The conquest of history. Harwood Academic Publishers.
Lua i Stíl Chicago (17ú heag.)Sanford, George. Poland: The Conquest of History. Australia: Harwood Academic Publishers, 1999.
Lua MLA (9ú heag.)Sanford, George. Poland: The Conquest of History. Harwood Academic Publishers, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.