Krul, W. “De Haagse School En Het Nationale Landschap”. BMGN - Low Countries Historical Review 121, no. 4 (January 1, 2006): 620–649. Accessed February 15, 2026. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107468.