Zerlinda, Naila. “Produktivitas Kerja Pegawai Dalam Pengelolaan Sistem E-Surat Di Sekretariat DPMPTSP Kota Surabaya”. Future Academia : The Journal of Multidisciplinary Research on Scientific and Advanced, vol. 4, no. 2, June 2026, pp. 850-62, doi:10.61579/future.v4i2.788.