angelina, Tamara, and Rizki Syafril. “ Evaluation of the Oca Chatbot System As a Customer Complaint Service of PT Telkom Witel West Sumatra”. Santhet (Jurnal Sejarah Pendidikan Dan Humaniora) 9, no. 5 (October 21, 2025): 1692–1700. Accessed October 25, 2025. https://ejournal.unibabwi.ac.id/index.php/santhet/article/view/6339.