Harefa, B., Harefa, E. B., Telaumbanua, A. and Telaumbanua, A. (2024) “Development of multimedia-based learning media on safety and occupational health and environment (K3LH) material”, Edumaspul: Jurnal Pendidikan, 8(1), pp. 740-765. Available at: https://jurnal.unimen.cloud/maspuljr/article/view/7719 (Accessed: 9December2025).