de Leeuw, Karl (1999). "The Black Chamber in the Dutch Republic during the War of the Spanish Succession and Its Aftermath, 1707-1715". The Historical Journal. 42 (1): 133–156. doi:10.1017/S0018246X98008292. JSTOR3020898. S2CID162387765.
de Leeuw, Karl (1999). "The Black Chamber in the Dutch Republic during the War of the Spanish Succession and Its Aftermath, 1707-1715". The Historical Journal. 42 (1): 133–156. doi:10.1017/S0018246X98008292. JSTOR3020898. S2CID162387765.
de Leeuw, Karl (1999). "The Black Chamber in the Dutch Republic during the War of the Spanish Succession and Its Aftermath, 1707-1715". The Historical Journal. 42 (1): 133–156. doi:10.1017/S0018246X98008292. JSTOR3020898. S2CID162387765.