Rifai, Bakhtiar, Yesi Ratna Sari, and Nanang Nuryadi. 2020. “Design Of Online Shopping Application Based On Mobile Devices And Android Studio In PT. Midi Utama Indonesia: Design Of Online Shopping Application Based On Mobile Devices And Android Studio In PT. Midi Utama Indonesia”. Jurnal Mantik 4 (1):392-98. https://www.iocscience.org/ejournal/index.php/mantik/article/view/755.