FIRDAUS, V.; UBAIDILLAH, H. .; OETARDJO, M. . Kinerja Relawan Sebagai Helping Profession Antara Profesionalisme dan Motivasi Altruistik . SPEED Journal : Journal of Special Education, [S. l.], v. 7, n. 1, p. 47–54, 2023. DOI: 10.31537/speed.v7i1.1216. Disponível em: https://jurnal.unipar.ac.id/index.php/speed/article/view/1216. Acesso em: 10 sep. 2024.