Sihombing, J. Rolles Herwin, and Selvyna Theresia. 2015. “Perancangan Sistem Informasi Prepaid Di Perusahaan Makanan Siap Saji XYZ”. ComTech: Computer, Mathematics and Engineering Applications 6 (2):215-28. https://doi.org/10.21512/comtech.v6i2.2266.