ELLY ROMY; MEI LISA. 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, [S. l.], v. 7, n. 2, p. 3228–3236, 2026. DOI: 10.36526/gandrung.v7i2.8526. Disponível em: https://ejournal.unibabwi.ac.id/index.php/gandrung/article/view/8526. Acesso em: 26 jul. 2026.