SIHOTANG, H.; SAMALOISA, B. Effectiveness of Implementing Principal Leadership Principles Towards Improving the Quality of Administrative Services Education at SMA Negeri Sipora Selatan, Mentawai. International Journal of Educational Management and Innovation, [S. l.], v. 6, n. 2, p. 124–135, 2025. DOI: 10.12928/ijemi.v6i2.12139. Disponível em: http://journal2.uad.ac.id/index.php/ijemi/article/view/12139. Acesso em: 5 dec. 2025.