“RANCANG BANGUN SISTEM INFORMASI ADMINISTRASI PELANGGAN FITNESS BERBASIS WEB”. Computer Science and Industrial Engineering 1, no. 01 (November 28, 2019): 112–121. Diakses Oktober 6, 2026. https://ejournal.upbatam.ac.id/index.php/comasiejournal/article/view/1569.