“F. Bulhof, Ma Patrie Est Au Ciel. Leven En Werk Van Willem Emmery De Perponcher Sedlnitzky (1741-1819)”. BMGN - Low Countries Historical Review 110, no. 1 (January 1, 1995): 121–122. Accessed June 30, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104570.