Hidayat, Rachmat, Haryanto Haryanto, and Pipin Sapinah. “Tunagrahita Student Learning Expert System With Backward Chaining Method at YKDW 01 Tangerang School”. Sinkron : jurnal dan penelitian teknik informatika 3, no. 2 (March 5, 2019): 32-38. Accessed July 16, 2024. https://jurnal.polgan.ac.id/index.php/sinkron/article/view/10020.