P.F. Maas, Parlementaire geschiedenis van Nederland na 1945, III, Het kabinet Drees-Van Schaik (1948-1951). Band A. Liberalisatie en sociale ordening. BMGN - Low Countries Historical Review, [S. l.], v. 109, n. 3, p. 510–511, 1994. DOI: 10.18352/bmgn-lchr.3915. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104497.. Acesso em: 2 jul. 2024.