Improving Achievement Motivation for Mentally Disabled Students at School for Exceptional Children (SLB) YPAC Pangkalpinang. BRP [Internet]. 29 Maret 2019 [dikutip 18 April 2026];2(1):15-24. Tersedia pada: https://www.berumpun.ubb.ac.id/index.php/BRP/article/view/8