SEMBIRING, ROSSIANNA, UC Mariance, and Irwan. “Design Of A Web-Based Membership Data Processing System At Vizta Gym Using A Prototype Method”. International Journal Of Computer Sciences and Mathematics Engineering 2, no. 2 (November 30, 2023): 254–261. Accessed October 6, 2024. https://ijecom.org/index.php/IJECOM/article/view/32.