SIREGAR, H. A. Factors Influencing Classroom Acoustic Design in North Sumatra: Bahasa Indonesia as the Language of Instruction. Serat Rupa: Journal of Design, [S. l.], v. 10, n. 1, p. 1–18, 2026. DOI: 10.28932/srjd.v10i1.11034. Disponível em: http://114.7.153.31/index.php/srjd/article/view/11034. Acesso em: 5 feb. 2026.