Van Rompay, Lucas. "J.P.M. van der Ploeg O.P. (1909-2004)" Hugoye: Journal of Syriac Studies, vol. 8, no. 1, 2011, pp. 9-12. https://doi.org/10.31826/hug-2011-080103
Van Rompay, L. (2011) J.P.M. van der Ploeg O.P. (1909-2004). Hugoye: Journal of Syriac Studies, Vol. 8 (Issue 1), pp. 9-12. https://doi.org/10.31826/hug-2011-080103