Sitanggang DP, Munthe B, Silalahi J. The Effect of Providing Reinforcement on Students’ Learning Motivation in Christian Religious Education Subjects Class IX of Talitakum Medan Private Junior High School. Innovative [Internet]. 2023 Sep. 30 [cited 2026 Jun. 10];3(4):9884-99. Available from: https://j-innovative.org/index.php/Innovative/article/view/4748