ERLINA BR MANURUNG; GULTOM , B. T. .; SIRAIT, P. H. . The Effect of Teachers’ Leadership and Communication Ability on Students’ Learning Motivation in Class VIII of SMP Negeri 13 Pematang Siantar. Indonesian Journal of Advanced Research, [S. l.], v. 2, n. 6, p. 589–602, 2023. DOI: 10.55927/ijar.v2i6.4698. Disponível em: https://journal.formosapublisher.org/index.php/ijar/article/view/4698. Acesso em: 21 may. 2026.