Muhamad Firdaus, and Elsen Ronando. “Pengembangan Aplikasi Penjaminan Mutu Pada PT Usaha Mulia Digital Indonesia (PT UMDI)”. PSHPM: Prosiding Seminar Hasil Kegiatan Pengabdian Masyarakat 1, no. 1 (August 3, 2022): 151-158. Accessed December 28, 2025. https://conference.untag-sby.ac.id/index.php/scfp/article/view/732.