Sibarani, Yusuf, and Tukhas Imroh. “Billing Risk Handling Based on Economic Learning Material Development Model Using FMEA and RCA Methods”. Scaffolding: Jurnal Pendidikan Islam dan Multikulturalisme 5, no. 1 (February 27, 2023): 224-233. Accessed March 28, 2025. https://ejournal.insuriponorogo.ac.id/index.php/scaffolding/article/view/2365.