HOLTHOON, F. van. G.J. Hooykaas, De briefwisseling van J. R. Thorbecke, IV, 1840-1845. BMGN - Low Countries Historical Review, [S. l.], v. 109, n. 4, p. 682–683, 1994. DOI: 10.18352/bmgn-lchr.3934. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104527. Acesso em: 2 mar. 2024.