Zerlinda, N. (2026). Produktivitas Kerja Pegawai dalam Pengelolaan Sistem E-Surat di Sekretariat DPMPTSP Kota Surabaya. Future Academia : The Journal of Multidisciplinary Research on Scientific and Advanced, 4(2), 850–862. https://doi.org/10.61579/future.v4i2.788