Ermina Waruwu, et al. “Cognitive Ability of Students in the Learning Process of Christian Religious Education Using a Scientific Approach at Budi Murni 2 Medan Catholic Private Senior High School ”. International Journal of Scientific Multidisciplinary Research, vol. 1, no. 7, Aug. 2023, pp. 719-26, doi:10.55927/ijsmr.v1i7.5441.