Perry, J. (2010). Christmas in Germany: A cultural history. University of North Carolina Press.
Lua i Stíl Chicago (17ú heag.)Perry, Joe. Christmas in Germany: A Cultural History. Chapel Hill: University of North Carolina Press, 2010.
Lua MLA (9ú heag.)Perry, Joe. Christmas in Germany: A Cultural History. University of North Carolina Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.