Campion, Jonas. “Piet De Rooy (ed.), Waakzaam in Amsterdam. Hoofdstad En Politie Vanaf 1275”. BMGN - Low Countries Historical Review 127, no. 4 (December 18, 2012): review 65. Accessed April 19, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-109861.