Y. . Iswanto and A. . Susilo, “Factors Affecting Customer Satisfaction of Online Bookstore at Universitas Terbuka Indonesia”, wajofel, vol. 2, no. 1, pp. 105–120, Mar. 2026, Accessed: Jun. 04, 2026. [Online]. Available: https://wajofel.org/index.php/wajofel/article/view/342