Siahaan, E. S. P., and C. E. Suharyanto. “PERANCANGAN DAN IMPLEMENTASI VIRTUAL PRIVATE NETWORK DENGAN MIKROTIK”. Computer and Science Industrial Engineering (COMASIE), vol. 5, no. 2, July 2021, pp. 47-58, https://forum.upbatam.ac.id/index.php/comasiejournal/article/view/3889.