Umilasari, Reni, et al. “Socialization of Qr Code Employee Attendance Applications Based on Android at the Balung Lor Village Office Jember Regency”. Kontribusia : Research Dissemination for Community Development, vol. 5, no. 2, Aug. 2022, pp. 57-63, doi:10.30587/kontribusia.v5i2.2981.