STRENGA, Gustavs. Gregory Leighton. Ideology and Holy Landscape in the Baltic Crusades. Leeds: Arc Humanities Press, 2022. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders. Online. 30 December 2023. Vol. 28, pp. 290-293. [Accessed 11 December 2025]. DOI 10.12775/OM.2023.013.