H. Langeveld, Schipper naast God. Hendrikus Colijn 1869-1944, II, 1933-1944. BMGN - Low Countries Historical Review, [S. l.], v. 120, n. 1, p. 157–159, 2005. DOI: 10.18352/bmgn-lchr.6197. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107092.. Acesso em: 16 sep. 2024.