ENGELEN, D. B. de Graaff, C. Wiebes, Villa Maarheeze. De geschiedenis van de Inlichtingendienst buitenland. BMGN - Low Countries Historical Review, [S. l.], v. 115, n. 2, p. 351–354, 2000. DOI: 10.18352/bmgn-lchr.5279. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106060.. Acesso em: 2 dec. 2024.