WILS, L. De taalpolitiek van Willem I. BMGN - Low Countries Historical Review, [S. l.], v. 92, n. 1, p. 81–87, 1977. DOI: 10.18352/bmgn-lchr.1970. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102132. Acesso em: 8 feb. 2023.