Shaping Children’s Learning Spirit Through Game and Singing Methods: Mentoring in the Sunday School of Jemat Kristen Indonesia Keluarga Kerajaan Salatiga. servire [Internet]. 2024 Dec. 30 [cited 2026 Oct. 12];5(1):1-14. Available from: https://jurnal.widyaagape.ac.id/index.php/servire/article/view/204