Tuyll, Hubert P. van. “Johan Den Hertog, Samuël Kruizinga (eds.), Caught in the Middle: Neutrals, Neutrality and the First World War”. BMGN - Low Countries Historical Review 127, no. 4 (December 18, 2012): review 93. Accessed April 24, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-109898.