Michael Fredrik Sihombing, Immanuel Onasis Kha Napitupulu, Ferry Deni Doloksaribu, Yesica Febrianti Tambunan, Pinka Laura Malau, and Ropinus Sidabutar. 2025. “Transformational Leadership Model of School Principals in Strengthening Civic Values: A Case Study at Erlangga Senior High School”. Young Journal of Social Sciences and Humanities 1 (4):193-202. https://journal.sufiya.org/index.php/yjssh/article/view/226.