“R.A. Koole, Het Belang Van Politieke Partijen”. BMGN - Low Countries Historical Review 101, no. 3 (January 1, 1986): 460–462. Accessed December 21, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103009.