BOSSCHER, D. 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://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107092. Acesso em: 4 may. 2024.