Peet, J.M. “O. Steens, Rooms En Studentikoos. Vriendschap, Geloof En Wetenschap in De Rooms-Katholieke Studenten Vereniging ’Sanctus Thomas Aquinas’ Te Amsterdam 1896-1980”. BMGN - Low Countries Historical Review 109, no. 3 (January 1, 1994): 500–501. Accessed November 21, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104490.