“J. Hemels, De Krant in Bedrijf. 75 Jaar Samenwerking En Samenleving”. BMGN - Low Countries Historical Review 100, no. 3 (January 1, 1985): 490–491. Accessed November 16, 2024. https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102867.