Sianturi DR, Rajagukguk D, Christopel Tambunan, Bella Simanjuntak, Patar Nababan, Robinhot Sihombing. Implementation of Christian Ethical Values for HKI Seisemayang Medan Special Resort Sunday School Children through the Cheerful Sunday Method by IAKN Tarutung Students. AJPR [Internet]. 2024 Apr. 29 [cited 2026 Apr. 18];3(1):29-44. Available from: https://journal.formosapublisher.org/index.php/ajpr/article/view/9550