Siaka Ernia, Siska, Nur Fajrie Nur Fajrie, and Diana Ermawati Diana Ermawati. “Learning Motivation Factors in Terms of the Role of Parents of Mentally Retarded Students at SLBS Sunan Muria”. Journal of Education and Culture 1, no. 1 (June 8, 2021). Accessed July 1, 2025. https://ejournal.indrainstitute.id/index.php/jec/article/view/5.