Sulis S, Permana S. The Effect Of Teacher Professionalism On The Performance Of Christian Religious Education Teachers, Elementary Schools In Surabaya City. Christian Education [Internet]. 2021 Nov. 28 [cited 2026 Apr. 30];4(2):29-3. Available from: https://jurnal.sttii-surabaya.ac.id/index.php/didaskalia/article/view/217