Suryani, Karmila, Rini Widyastuti, Ashabul Khairi, and Muhammad Nurul. “Designing E-Commerce Applications for Learning Products in University”. Knowbase : International Journal of Knowledge in Database 1, no. 1 (June 30, 2021): 12–24. Accessed December 19, 2025. https://ejournal.uinbukittinggi.ac.id/index.php/ijokid/article/view/5032.