ANDRIAN, Andrian; GANEFRI, Ganefri; SUKARDI, Sukardi. Validity trainer tool as learning media for electric power distribution system. Jurnal Pendidikan Teknologi Kejuruan, Padang, Indonesia, v. 3, n. 3, p. 139–146, 2020. DOI: 10.24036/jptk.v3i3.13023. Disponível em: http://jptk.ppj.unp.ac.id/index.php/jptk/article/view/130. Acesso em: 22 jul. 2026.