Degraeve, Matthijs. “Joost Kingma, Tussen Ideaal En Kapitaal. Bouwfonds, 1946-2006”. TSEG - The Low Countries Journal of Social and Economic History 14, no. 4 (April 17, 2018): 152–155. Accessed November 24, 2024. https://tseg.nl/article/view/8266.