MICHAEL FREDRIK SIHOMBING; IMMANUEL ONASIS KHA NAPITUPULU; FERRY DENI DOLOKSARIBU; YESICA FEBRIANTI TAMBUNAN; PINKA LAURA MALAU; ROPINUS SIDABUTAR. 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, [S. l.], v. 1, n. 4, p. 193–202, 2025. Disponível em: https://journal.sufiya.org/index.php/yjssh/article/view/226. Acesso em: 11 feb. 2026.