Silvesta, Y. P., Mustafa, I., & Sedu, V. A. (2025). The Role of Effective Communication Training to Improve Skills and Productivity by the Sikka Regency Manpower and Transmigration Service. Jurnal Indonesia Sosial Sains, 6(1), 53–57. https://doi.org/10.59141/jiss.v6i1.1558