RIDDER-SYMOENS, H. de. Beschavingsoffensief of verraad van de middenklassen?. BMGN - Low Countries Historical Review, [S. l.], v. 106, n. 3, p. 426–433, 1991. DOI: 10.18352/bmgn-lchr.3412. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103881. Acesso em: 3 may. 2024.