Fiandoyo, Nia Rachmawati. “Efektivitas Proses Surat Menyurat Pada Sub Bagian Tata Usaha Di UPT BLP2TK Surabaya ”. Future Academia : The Journal of Multidisciplinary Research on Scientific and Advanced, vol. 4, no. 1, Feb. 2026, pp. 483-91, doi:10.61579/future.v4i1.749.