H. Gortzak, Hoop zonder illusies. Memoires van een communist. BMGN - Low Countries Historical Review, [S. l.], v. 102, n. 2, p. 309–310, 1987. DOI: 10.18352/bmgn-lchr.2841. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103189.. Acesso em: 22 dec. 2024.