Sutomo, Sugiarto, Sarkadi Sarkadi, and Lixiang Mao. “Strategies for Prevention and Management of Student Violence in Kristen Calvin Middle School Central Jakarta”. International Education Trend Issues 1, no. 2 (December 1, 2023): 448 - 459. Accessed July 8, 2025. http://ijble.com/index.php/ieti/article/view/324.