Erlina Br Manurung, Gultom , B. T. . and Sirait, P. H. . (2023) “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, 2(6), pp. 589–602. doi: 10.55927/ijar.v2i6.4698.