Elly Romy and Mei Lisa (2026) “Increasing Professionalism Through Effective Business Communication Training in the Digital Era at the Merah Putih Village Cooperative, STM Hulu District, Deli Serdang Regency”, GANDRUNG: Jurnal Pengabdian Kepada Masyarakat, 7(2), pp. 3228–3236. doi: 10.36526/gandrung.v7i2.8526.