TUMANGGOR, Salman. The Impact of Principal Leadership in Guidance and Counseling Services on Self-Development of Senior High School Students. Islamic Guidance and Counseling Journal, [S. l.], v. 3, n. 2, p. 130–135, 2020. DOI: 10.25217/igcj.v3i2.550. Disponível em: https://igcjournal.com/index.php/home/article/view/550. Acesso em: 16 oct. 2026.