R.A. Koole, Het belang van politieke partijen. BMGN - Low Countries Historical Review, [S. l.], v. 101, n. 3, p. 460–462, 1986. DOI: 10.18352/bmgn-lchr.2751. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103009.. Acesso em: 21 dec. 2024.