H.A. Groeneveld, De staatssecretaris in Nederland 1948-1988. BMGN - Low Countries Historical Review, [S. l.], v. 109, n. 3, p. 511–513, 1994. DOI: 10.18352/bmgn-lchr.3916. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104498.. Acesso em: 2 jul. 2024.