Kusumo, F. N., Triayudi, A., & Sahara, R. (2020). Application On Payment UPS Online For Students Android-Based National University Information System: Application On Payment UPS Online For Students Android-Based National University Information System. Jurnal Mantik, 4(1), 926-935. Retrieved from https://www.iocscience.org/ejournal/index.php/mantik/article/view/829