Mujahidin, Achmad Isra. 2026. “Measuring User Satisfaction on the PosAja Application at PT Pos Indonesia, Sidoarjo Branch Office: Mengukur Tingkat Kepuasan Pengguna Aplikasi PosAja Di PT Pos Indonesia, Kantor Cabang Sidoarjo”. Indonesian Journal of Innovation Studies 26 (1):10.21070/ijins.v26i1.2402. https://doi.org/10.21070/ijins.v26i1.2402.