Kraker, A.M.J. de. “N. Van Dooren, R. Van Leeuwen, Alle Hosper, Landschapsarchitect 1943-1997”. BMGN - Low Countries Historical Review 119, no. 3 (January 1, 2004): 453–455. Accessed August 17, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107022.