FRIJHOFF, W. C. Harline, The burdens of sister Margaret. BMGN - Low Countries Historical Review, [S. l.], v. 112, n. 1, p. 134–135, 1997. DOI: 10.18352/bmgn-lchr.4425. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105105. Acesso em: 3 may. 2024.