Doris Yolanda Saragih, et al. “International Collaboration in Business English Learning: Enhancing Global Communication Skills of Polytechnic Students ”. Jurnal Bersama Pengabdian Kepada Masyarakat (SAMAMAS), vol. 1, no. 4, Dec. 2025, pp. 160-7, doi:10.55123/samamas.v1i4.328.