Kwiatkowski, Krzysztof. “Jürgen Sarnowsky, Die Johanniter. Ein Geistlicher Ritterorden in Mittelalter Und Neuzeit”. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders 17 (July 1, 2012): 217–220. Accessed November 8, 2025. https://apcz.umk.pl/OM/article/view/NO_DOI_2012_08.