Schutte, G.J. “R. Klooster, Groninger Godgeleerdheid in Friesland 1830-1872”. BMGN - Low Countries Historical Review 117, no. 1 (January 1, 2002): 116–118. Accessed November 22, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106470.