Gijswijt-Hofstra, M. “C. Willemsen, Van God Los. Geschiedenis Van De Psychiatrische Inrichting Sint-Antonius, 1902-1967”. BMGN - Low Countries Historical Review 114, no. 4 (January 1, 1999): 636–638. Accessed May 4, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105878.